This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
In chronic alcoholism the rate limiting component for alcohol metabolism excluding enzymes is / are: 
Select and explain. 
A. NADP, B. NAD, C. None, D. FADH
B: NAD
Answer: B: NAD 
Explanation: NAD