This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pediatrics
[{'content': 'Definition of Diabetes mellitus includes: \nSelect and explain. \nA. Fasting blood glucose >126 mg/dL, B. Random blood glucose >140 mg/dL, C. HbA1c <7%, D. Post prandial blood glucose >180 mg/dL', 'role': 'user'}, {'content': "Answer: A \nExplanation: a. Fasting blood glucose >126mg/dL(Ref: Nelson's 20/e p 2760-2780, Ghat 8/e p 541-548)Fasting blood glucose >12.6mg/dL or 2 hr post prandia or rangdom glucose 200mg/dL or HbA1c>6.5% in presence of symptoms like polyuria and polydipsia are diagnostic of diabetes mellitus.", 'role': 'assistant'}]