Topic: Pronoun (সর্বনাম),

Best Answer Explained in Below-:

The correct answer to fill in the blank in the sentence "Between ----, this is the greatest book I've ever read." is "you and me." This choice is grammatically correct owing to the rules of prepositional phrases in English.

When using the preposition "between," the objects of the preposition must be in the objective case. The objective case refers to the forms of pronouns used when they are the object of a verb or preposition. In this context, "you" is already correct as it is the same in both nominative and objective cases. However, "I" alters to "me" in the objective case, so "you" followed by "me" is the necessary pairing here.

The other options fail because "I" (A & B) is incorrect in this context; it does not fit the structure since "I" should not be used when functioning as the object. In informal language, some might hear "you and I" but grammatically, it’s a common mistake in this specific context. Thus, the correct and most appropriate phrase is "between you and me," making option C the right choice.