"What does she play?"
Translation:वह क्या खेलती है?
'Kya' at the beginning of a sentence denotes a yes/no question. Basically, you make a statement into a yes/no question by prefixing a 'kya'. So, क्या वह खेलती है is 'Does she play?'.
'Kya' right before the verb means 'What' making 'वह क्या खेलती है?', 'What does she play?'.