The correct punctuation for the question would be ¿Que prefieres: (something) o (something)?
Explanation:
This is because when you ask a question, you always place both "¿" & "?" In the beginning of the question and at the end of the question.
For example, ¿Que prefieres piñas o manzanas? So this is a question being asked. Notice how both of "¿" & "?" are at the begining and end. I hoped this helped! Good luck sunshine! <3
