What should I use? When you ask a person to choose only one kind of thing.
- Which one do you like? apples, candies or cookies?
or
- Which ones do you like? apples, candies or cookies?
English Language Learners Stack Exchange is a question and answer site for speakers of other languages learning English. It only takes a minute to sign up.
Sign up to join this communityWhat should I use? When you ask a person to choose only one kind of thing.
- Which one do you like? apples, candies or cookies?
or
- Which ones do you like? apples, candies or cookies?
Which one.
"Which ones" invites multiple answers.
'Which ones do you like?' is a general question - we can easily like two or all three of those choices, so inviting 'multiple answers' is not a bad thing. But if I'm offering you one of these things as a snack now, I might ask 'Which one do you like?', but would probably ask 'Which one would you like?'.