Which one is you or which one are you is correct?

The correct answer is ‘Which one is you?’ . But you could say ‘You are which one?’ If ‘Which one’ is the subject of the sentence the verb is ‘is’.

Is it correct to say which?

“which,” there’s a really easy way to tell if you should be using one or the other. It doesn’t work 100% of the time, but it will help with many situations. If you think it might be “which,” try adding the words “of your” or “of” and another pronoun right after it. If that works, “which” is the correct choice.