Question

Fill in the blank with the most appropriate word.
_________ of his books do you like best?
a) Which
b) What
c) Who
d) Whom

Answer 1

Hint: An interrogative pronoun is (grammar) a pronoun used in a question. In English, the five interrogative pronouns are what, which, who, whom, and whose (also used as relative pronouns). These require no antecedent.

Complete answer:
In the given question, we have to find out which of the options given to us indicate that a specific book is being asked about (the one which you likes best).
Let us thus analyze the options given to us in this question-
Option (a.), 'which', is defined as ‘What, of those mentioned or implied (used interrogatively).’Therefore, option (a.) is correct.
Option (b.), ‘what', is defined as ‘Which; which kind of.’Therefore, option (b.) is incorrect as the specification of a particular kind of book (his books) has already been made.
Option (c.), ‘who', is defined as ‘(interrogative pronoun) What person or people; which person or people (used in a direct or indirect question).’Therefore, option (c.) is incorrect as a book is not a person.
Option (d.), ‘whom', is defined as ‘(formal) What person or people; which person or people, as the object of a verb.’Therefore, option (d.) is incorrect as a book is not a person.

Note:
In this question, it will be helpful for the student to recall the concept of determiners. A determiner is one of a limited class of noun modifiers that determine the referents of noun phrases. For example- which.