This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Biochemistry
Products formed from alcohol but not the intermediate of TCA cycle? 
Select and explain. 
A. Acetaldehyde, B. Succinate, C. Fumarate, D. Oxaloacetate
A: Acetaldehyde
Answer: A: Acetaldehyde 
Explanation: Acetaldehyde is formed from alcohol and not intermediate of TCA cycle. Whereas, Succinate,fumarate and oxaloacetate all are intermediate of TCA