This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
6-PhosphoGluconate dehydrogenase need 
Select and explain. 
A. NAD, B. NADPH, C. FAD, D. FMN
B: NADPH
Answer: B: NADPH 
Explanation: The synthesis of glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase may also be induced by insulin in the fed state,A second oxidative step is catalyzed by 6-phosphogluconate dehydrogenase, which also requires NADP+ as hydrogen acceptor.Ref: Harper&;s Biochemistry, 30th edition, page no: 210