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
[{'content': 'What is the effect of sodium fluoride on Oxygen dissociation curve \nSelect and explain. \nA. Right shift, B. Left shift, C. No effect on curve, D. Initial right and then left shift', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sodium fluoride totally arrests glycolysis by inhibiting enzymes so, glucose in neither used for anaerobic glycolysis or Rappaport Leubering Cycle. So, NaF have no effect on Oxygen dissociation Curve by affecting the level of 2, 3 - BPG.', 'role': 'assistant'}]