1whose 
/ˈhu:z/ adjective
/ˈhu:z/ adjective 1 — used in questions to ask who owns something, has something, etc. ▪ Whose bag is it? ▪ I wonder whose story was chosen. ▪ Whose side are you on anyway? 2 — used to show which person or thing you are talking about ▪ The gentleman whose cell phone was stolen was very upset. ▪ The prize will go to the writer whose story shows the most imagination. ▪ the book whose cover is torn 3 — used to give more information about a person or thing that has already been mentioned ▪ The curator, whose name I've since forgotten, put together an exceptional exhibit. ▪ My roommate, whose sister is an actress, gets lots of requests for autographs.
Do not confuse whose with who's.
