This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
[{'content': 'For glucose estimation in blood, the mode of transport from a PHC to lab: \nSelect and explain. \nA. Sodium fluoride, B. EDTA, C. Citrate, D. 0.9% saline', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. A. Sodium fluorideIn glycolysis, (i.e. the pathway in which, glucose is utilized to form energy), 'Enolase' is an enzyme which converts 2- phosphoglycerate to a high energy compound phosphoenolpyruvate.a. This enzyme requires Mg++&Mn++ & is inhibited by fluoride.b. For blood glucose estimation, fluoride is added to the blood to prevent glycolysis by cells, so that the blood glucose is correctly estimated.", 'role': 'assistant'}]