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
Products formed from alcohol and not intermediates of TCA cycle/glycolysis: 
Select and explain. 
A. Acetaldehyde, B. Pyruvate, C. Lactate, D. Oxalate
A: Acetaldehyde
Answer: A: Acetaldehyde 
Explanation: A i.e. Acetyldehyde