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: Physiology
In PHC, which anticoagulant is used to send the blood sample for blood glucose: 
Select and explain. 
A. EDTA, B. Heparin, C. Potassium oxalate + sodium fluoride, D. Potassium oxalate
C: Potassium oxalate + sodium fluoride
Answer: C: Potassium oxalate + sodium fluoride 
Explanation: None