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
What is the end  product of anaerobic glycolysis 
Select and explain. 
A. 2ATP + 2NAD, B. 2ATP + 2NADH, C. 2ATP + 2 FADH2, D. 4ATP + 2NAD
A: 2ATP + 2NAD
Answer: A: 2ATP + 2NAD 
Explanation: 2ATP and 2 NAD are the end product of anaerobic glycolysis.
4ATPs are produced in total, but 2ATPs are used by hexokinase, PFK-1 (one each)