Question

Choose the option that best fills in the blank:

___ is the book you are reading?

• A. whom
• B. who
• C. why
• D. whose

Answer 1

The correct option is D whose

Since the question is about the person who possesses an object, here, the book, "whose" should be used. Hence, Option D is correct. The rest of the options do not adhere to this rule, hence incorrect.