Topic: Pronoun (সর্বনাম),

Best Answer Explained in Below-:

The question "__ among you are from Class XII?" requires a word that appropriately refers to people, specifically asking about a group. The correct answer is "Who" (option B).

In English grammar, "who" is used as a subject pronoun that refers to one or more individuals performing an action or being described. In this context, the sentence is seeking to identify individuals from the group "you" who belong to Class XII. Therefore, "who" is suitable as it connects directly to the persons in question.

On the other hand, "which" (option A) is typically used to refer to a selection among things, not people, making it inappropriate here. "Whom" (option C) is the object form of "who" and is used for the object of a verb or preposition, which does not fit the subject-focused nature of the question. Finally, "whose" (option D) indicates possession, which is also irrelevant in this context. Thus, "who" is the only appropriate choice, as it accurately addresses the subject of the inquiry about individuals in Class XII.