"Who is your choice in this round?"
Translation:Siapa pilihan kamu di putaran ini?
Siapa + object = do not include yang
Siapa itu? Who is that?
Siapa namanya? What is his name?
Siapa ibumu? Who is your mother?
Siapa + verb = include yang
Siapa yang duduk di sini? Who is sitting here?
Siapa yang mau pergi ke Bali? Who wants to go to Bali?
Siapa yang pernah berkunjung ke Turki? Who has ever visited Turkey?
Hope this helps as a starting point.