Chief Election Commissioner:

The Chief Election Commissioner heads over the election commission of India. A chief election commissioner is generally from the civil services background; a person from the Indian administrative service is given priority. The primary duties of the election commission of India include the conduct of free and fair elections in the nation. Most of the polls in the country, be it for the position of a president, vice president, national or state legislatures, are under the direct control of the election commission of India.

DUTY OF CHIEF COMMISSIONER:

1. The chief election commissioner should ensure no discrimination or biases towards anyone while on election duty.
2. He should ensure that elections are held under complete transparency, and nothing is hidden from the people, i.e. the citizens of India who are the backbone behind India’s elections. 
3. The Chief election Commissioner should make sure that there is no manipulation or partisanship during the conduct of elections at his election duty.
4.  The Chief election commissioner has to present a list of all the eligible voters.
5. They should supervise the nomination of a candidate for becoming a part of the elections or a political party.
6. Registration of different political parties.
7.  Monitoring an election campaign and keeping a check on misbehavior or false practices are taken up, if any, while on election duty.
8. Helps the media in covering the elections and the process thoroughly.
9. Keep an eye on the counting of votes.
10.  Organizes polling booths for the conduct of elections and reaches the booth for election duty.
11. Declaration of the results of the election.
12. The chief election commissioner ensures that all election commission rules are followed.

Sukumar Sen (2 January 1898 – 13 May 1963) was an Indian civil servant who was the 1st Chief Election Commissioner of India, serving from 21 March 1950 to 19 December 1958.

• Under his leadership, the Election Commission successfully administered and oversaw independent India's first two general elections, in 1951–52 and in 1957. He also served as first Chief Election Commissioner in Sudan in 1953.Sen was born on 2 January 1899 in a Bengali Baidya-Brahmin family.
• He was the elder or eldest son of a civil servant Akshoy Kumar Sen.
• Sukumar Sen, in his role as the Chief Election Commissioner of India, was charged with overseeing the 1952 Indian General Election, which was the first election in the history of independent India.
• Historian Ramachandra Guha wrote of Sukumar Sen in The Hindu in 2002, on the 50th anniversary of independent India's first general election.

Hence, Option D Is Correct.

Simlipal is a tiger reserve in the Mayurbhanj district in the Indian state of Odisha.

• it is part of the Mayurbhanj Elephant Reserve, which includes three protected areas—Similipal Tiger Reserve, Hadgarh Wildlife Sanctuary with 191.06 km² (73.77 sq mi) and Kuldiha Wildlife Sanctuary with 272.75 km² (105.31 sq mi).

Flora:

• The park is a treasure house of 1,076 species of plants belonging to 102 families. 96 species of orchids have been identified here. It lies in the Eastern Highlands moist deciduous forests ecoregion, with tropical moist broadleaf forest and tropical moist deciduous forests with dry deciduous hill forest and high level Sal forests.
• The grasslands and the savannas provide grazing grounds for the herbivores and hiding places to the carnivores. The forest boasts of innumerable medicinal and aromatic plants, which provide a source of earnings for the tribal people. Eucalyptus, planted by the British during the 1900s, are also found.

Fauna:

A total of 42 species of mammals, 242 species of birds and 30 species of reptiles have been recorded in Simlipal National Park.The major mammals include:

• tiger,
• leopard,
• Asian elephant,
• sambar,
• barking deer,
• gaur,
• jungle cat,
• wild boar,
• chausingha (four horned antelope),
• giant squirrel and
• common langur.

Hence Option B Is Correct.

 Albert Victor Nicholas Louis Francis Mountbatten, 1st Earl Mountbatten of Burma (25 June 1900 – 27 August 1979) was a British statesman, naval officer, colonial administrator and close relative of the British royal family. Mountbatten, who was of German descent, was born in the United Kingdom to the prominent Battenberg family.

• He was a maternal uncle of Prince Philip, Duke of Edinburgh, and a second cousin of King George VI.
• He joined the Royal Navy during the First World War and was appointed Supreme Allied Commander, South East Asia Command, in the Second World War. He later served as the last Viceroy of India and briefly as the first Governor-General of the Dominion of India.
• Mountbatten attended the Royal Naval College, Osborne, before entering the Royal Navy in 1916.
• He saw action during the closing phase of the First World War, and after the war briefly attended Christ's College, Cambridge. During the interwar period, Mountbatten continued to pursue his naval career, specialising in naval communications.

Mountbatten Plan Background:

• Lord Mountbatten came to India as the last Viceroy and was assigned the task of a speedy transfer of power by the then British Prime Minister Clement Atlee.
• In May 1947, Mountbatten came up with a plan under which he proposed that the provinces be declared independent successor states and then be allowed to choose whether to join the constituent assembly or not. This plan was called the ‘Dickie Bird Plan’.
• Jawaharlal Nehru (Born on November 14, 1889) when apprised of the plan, vehemently opposed it saying it would lead to Balkanisation of the country. Hence, this plan was also called Plan Balkan.
• Then, the viceroy came up with another plan called the June 3 Plan. This plan was the last plan for Indian independence. It is also called the Mountbatten Plan.
• The June 3 Plan included the principles of partition, autonomy, sovereignty to both nations, right to make their own constitution.
• Above all, the Princely States such as Jammu and Kashmir were given a choice to either join India or Pakistan. The consequences of these choices would affect the new nations for decades to come.
• This plan was accepted by both the Congress and the Muslim League. By then, the Congress had also accepted the inevitability of the partition.
• This plan was put into action by the Indian Independence Act 1947 which was passed in the British Parliament and received the royal assent on 18 July 1947

On the midnight of 14th and 15th August 1947, the dominions of Pakistan and India respectively came into existence. Lord Mountbatten was appointed the first Governor-General of independent India and M .A. Jinnah became the Governor-General of Pakistan.

Hence Option A Is Correct.