Pronouns: are words that can replace a noun in a sentence. Their role in a sentence is similar to that of a noun. The noun that is replaced by any pronoun is called its antecedent. For Example

Rohan is a good student. He is very attentive in the class.

Here He is pronoun as it replaces the noun Rohan.

Personal Pronoun:  Personal pronouns that refer to the association with a particular person or noun. There are two types of personal pronouns.

Subject Personal Pronouns: They refer to the subject of a sentence. For example : we, you, I, he, she etc. They are also called pronouns of the nominative case.

Object Personal Prononuns: They refer to the object of a sentence. For example : me, us, her, them etc. They are also called pronouns of the objective case.

Use of Personal Pronoun:

• They should agree in number, gender and person with the noun that they replace.
• When they are used for collective noun, it should be singular in number and of neuter gender.
• When they are used for collective noun, where each individual is considered separate they are used in plural.

In the question : -

The manager and I had to travel a lot to promote our newly designed product. 

Thus , the Correct Option is A , which is I.

Pronouns: are words that can replace a noun in a sentence. Their role in a sentence is similar to that of a noun. The noun that is replaced by any pronoun is called its antecedent. For Example

Rohan is a good student. He is very attentive in the class.

Here He is pronoun as it replaces the noun Rohan.

Personal Pronoun:  Personal pronouns that refer to the association with a particular person or noun. There are two types of personal pronouns.

Subject Personal Pronouns: They refer to the subject of a sentence. For example : we, you, I, he, she etc. They are also called pronouns of the nominative case.

Object Personal Prononuns: They refer to the object of a sentence. For example : me, us, her, them etc. They are also called pronouns of the objective case.

Use of Personal Pronoun:

• They should agree in number, gender and person with the noun that they replace.
• When they are used for collective noun, it should be singular in number and of neuter gender.
• When they are used for collective noun, where each individual is considered separate they are used in plural.

In the question : -

1. The carrots went bad so we had to throw them away . In this sentence , them is the correct personal pronoun because it is used in place of the noun carrots .

2. Rishi bought a new laptop three months ago. He absolutely loves it. In this sentence , he , it the correct personal  pronoun because he is used in place of the noun rishi and it is used in place of noun laptop .

Thus , the Correct Option is C , which is Them , He , it .

Pronouns: are words that can replace a noun in a sentence. Their role in a sentence is similar to that of a noun. The noun that is replaced by any pronoun is called its antecedent. For Example

Shivani has completed her homework and now she is watching t.v.

Here She is pronoun as it replaces the noun Shivani.

Personal Pronoun:  Personal pronouns that refer to the association with a particular person or noun. There are two types of personal pronouns.

Subject Personal Pronouns: They refer to the subject of a sentence. For example : we, you, I, he, she etc. They are also called pronouns of the nominative case.

Object Personal Pronouns: They refer to the object of a sentence. For example : me, us, her, them etc. They are also called pronouns of the objective case.

In the question : -

People visit our town  and _____ enjoy the fair .

The correct pronoun that can be placed in the blank part is They .

Other Usage : - They does not like our match .

Option A : - Him : - ( masculine form of he ) Yes I saw him in town last week.

Option B : - Her : - (feminine form of she ) She didn’t like the way he spoke to her.

Option D : - He : - (Singular , masculine pronoun) He did it himself .

Thus , the Correct Option is C , which is they .