B1
used to ask who something belongs to or who someone or something is connected to
Dictionary examples:
Whose homework is covered in paw prints and drool? (0.0)
Whose phone is singing 'I Will Survive' in the library? (0.0)
Whose cat is wearing sunglasses and a tiny hat? (0.0)
Whose is this bag? (14.2)
Whose is that book? (17.1)