Ace the TSA CBT Exam 2026 – Get Ready to Fly Through with Confidence!

The correct answer is "which" because it is an interrogative pronoun used to ask questions about a specific item or items among a defined set. For example, in the question "Which book do you want?" the word "which" is directly inquiring about a particular book from the options available.

Other words in the list serve different grammatical roles. "Everyone" is an indefinite pronoun referring to all people in a group, while "few" refers to a small number within a group but does not ask a question. "Somebody" is also an indefinite pronoun that implies an unspecified person without posing a question. So, "which" stands out as the only interrogative pronoun.