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
Hexose monophosphate shunt occurs in except 
Select and explain. 
A. Liver, B. Adipose tissue, C. Mammary gland, D. Skin
D: Skin
Answer: D: Skin 
Explanation: In mammals, the PPP occurs exclusively in the cytoplasm and is found to be most active in the liver, mammary gland and adrenal coex in the human. The PPP is one of the three main ways the body creates molecules with reducing power, accounting for approximately 60% of NADPH production in humansRef: DM Vasudevan, 7th edition