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
Per TCA with 3 NADH and 1 FADH2, generates how many ATP? 
Select and explain. 
A. 6, B. 9, C. 12, D. 15
B: 9
Answer: B: 9 
Explanation: Ans. is 'b' i.e., 9One NADH produces 2.5 ATP and one FADH2 produces 1.5 ATP. Thus 3 NADH and 1 FADH2 will produce 9 ATP.There is production of ATP at substrate level also, Thus total 10 ATP molecules are produced per cycle.