Choose the sentence that uses correct pronoun case.

• A. Between you and me, this is our plan.
• B. Between you and I, this is our plan.
• C. This plan is between me and you.
• D. Between I and you, this is our plan.

Answer: (A)

When a preposition is used, the pronouns that follow must be in the objective case. Here, between introduces a prepositional phrase, so the pronouns after it should be in objective form. “You” is fine because it doesn't change between nominative and objective, but the other pronoun should be in its objective form, which is “me.” That makes the natural and correct version: Between you and me, this is our plan. Using the nominative form “I” after a preposition is incorrect, as in “Between you and I” or “Between I and you.” A variant like “This plan is between me and you” is grammatical, but the most standard, clear construction is the one that puts the addressed person first, hence the preferred choice.