This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fatty acid and synthesis, Subject name: Biochemistry
Acetyl-CoA is transpoed out of the mitochondria in order to serve as a substrate for fatty acid or cholesterol synthesis. Which of the following enzymes used in this transpo process provides NADPH required for these reductive biosynthesis reactions? 
Select and explain. 
A. ATP-citrate lyase, B. Citrate synthase, C. Malate dehydrogenase, D. Malic enzyme
D: Malic enzyme
Answer: D: Malic enzyme 
Explanation: Do not confuse malic enzyme with malate dehydrogenase. Malate dehydrogenase Malic enzyme Produces NADH Produces NADPH