Fill in the blank with a suitable pronoun:
_______ bags are these?
Interrogative pronouns are used for asking questions. ‘Who’, ‘whom’, ‘whose’ and ‘which’ are interrogative pronouns. We use ‘who’ and ‘whom’ to ask questions about the people. ‘Who’ is used in the place of the subject of the question, like in “Who are they?”. While ‘whom’ is used in the place of the object of the sentence, like in “To whom is Dad talking?”. Since the given sentence doesn’t ask a question about the people, both ‘who’ and ‘whom’ are unsuitable. Thus options A and D are incorrect. On the other hand, we use ‘whose’ to ask to whom something belongs to. Since the given sentence focuses on the person the bag belongs to, ‘whose’ is the apt answer. Therefore option B is correct. ‘Which’ cannot be used in the sentence because it is used to ask someone to name a particular thing, which is not the case here. For example, “Which do you prefer?” Thus option C is incorrect.