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
PFK-I inhibitor ? 
Select and explain. 
A. AMP, B. Citrate, C. Glucose 6 phosphate, D. Insulin
B: Citrate
Answer: B: Citrate 
Explanation: Ans. is 'b' i.e., Citrate