Which / Which one

For the following dialogue, which is the suitable reply?

The girl showed the boy an apple and an orange in her hand. She asked the boy which one would he choose.

A: (1) What should you want?

(2) What do you want?

(3) What do you want to eat?

(4) You want orange or apple? / You take the apple or orange?

(5) Would you want an apple or an orange?

(6) Could you eat the apple or orange?

(7) Would you want to take an apple or orange?

(8) Which one would you like to eat?

(9) Which one do you want? An apple or an orange?

(10) Which one do you want, an apple or an orange?

(11) Which do you prefer? An orange or an apple?

B: I'll take the apple, please.

Thanks