A recipe for beef stroganoff calls for 2 cups of sliced mushrooms and 4 cups of cooked

Question:

A recipe for beef stroganoff calls for 2 cups of sliced mushrooms and 4 cups of cooked noodles. Calculate the given unit ratio. What does your result mean in this situation?
a. The unit ratio of the number of cups of sliced mushrooms to the number of cups of cooked noodles
b. The unit ratio of the number of cups of cooked noodles to the number of cups of sliced mushrooms