“who is your father in the crowd?” Vs “which is your father in the crowd?”
Which is correct? What is difference in meaning between them?
I think "Which" is the best interrogative pronoun here. You clearly are asking someone to choose from within a number of choices; and "who" doesn't convey that meaning. When you ask with "Who" the most natural answer would be about the identity of that person.
-Which is your father? -He is the man in white.
-Who is your father? -He is Dr. Peter Smith.
Take a look here. "Who" is never used for asking about choices.
When the words are used as pronouns, without nouns immediately after them, we generally use "who" for people. Like for example - "Who fainted ? "
But to represent the identity of a person / people , we often use "which". Here , from the whole crowd we have to identify his/her father. So, we should use " Which is your father in the crowd?" The answer could: " The man in short height and white shirt."