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: Medicine
[{'content': 'Impaired oral GTT indicated by- \nSelect and explain. \nA. Fasting plasma sugar > 126 mg\\/dl, B. Random blood sugar > 200 mg\\/dl, C. Fasting blood sugar < 90 mg\\/dl, D. Fasting blood sugar <126 mg\\/dl and two hours after glucose load 140-199 mg\\/dL', 'role': 'user'}, {'content': "Answer: D \nExplanation: Impaired glucose tolerance : Fasting blood sugar <126 mg/dl and two hours after glucose load 140-199 mg/dL. Impaired fasting glucose : Fasting blood sugar 110-125 mg /dL mg/dl and two hours after glucose load <140mg/dLDiabetes : Fasting blood glucose > 126 mg/dL and 2 hr after glucose load > 200 mg /dL Reference : page 809 Davidson's Principles and practice of Medicine 22nd edition", 'role': 'assistant'}]