The correct sentence is: “Taruna is the receptionist whom I have employed in my office.”
To understand this, remember that “who” is used as a subject, while “whom” is used as an object in a sentence.
Here, “I have employed” is the clause, where “I” is the subject and “Taruna” is the object of the verb “employed.”
Hence, “whom” is the correct pronoun because it refers to the object of the verb.
Let’s assess the options:
- (A) who — incorrect, because it would act as a subject, but the clause already has one.
- (B) which — used for objects or animals, not people.
- (C) whose — shows possession, which is not the case here.
- (D) whom — correct object pronoun used for people in this context.
Therefore, the right choice is (D) whom.