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
Which of the following anticoagulants used in estimating blood glucose prevents glycolysis 
Select and explain. 
A. Oxalate, B. Citrate, C. NaF, D. Heparin
C: NaF
Answer: C: NaF 
Explanation: None