This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
Which of the following alcoholic metabolite, after metabolizing in liver causes flushing in Asian population and native Americans 
Select and explain. 
A. Acetone, B. Acetaldehyde, C. Methanol, D. Formaldehyde
B: Acetaldehyde
Answer: B: Acetaldehyde 
Explanation: Ans: B (Acetaldehyde) Ref: Harper, 25th p.279Some Asian populations and native Americans following alcohol consumption are prone to increased adverse reactions to acetaldehyde owing to a genetic defect of mitochondrial aldehyde dehydrogenase.This was a direct pick from Harper.