Question

A common grammar mistake is to mix up ‘who’s’ and ‘whose’. Which of these sentences is incorrect?
1. whose clothes are these?
2. who's going to the party tonight?
3. Can you tell me who's got my jacket?
4. Who's book do these belong to?

Answer 1

One angel lone and two is right who’s is a contraction of who is and whose is a possessive

Answer 2

The last. Study on each word and it's meaning to better understand