When creating a question with more than one correct answer, it would be great to have somewhere (perhaps just above the answers) how many answers the learner needs to select to get the question correct. For example -

Q. What ingredients do you need to bake a cake?

(Select the 3 correct answers)

A. Milk

B. Eggs

C. Flour

D. Cheese

From a user perspective it helps the learner think clearly about what the answer(s) should be