This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Diabetes mellitus is best diagnosed by \nSelect and explain. \nA. Fasting blood sugar > 100mg/dl and post prandial blood sugar > 140mg/dl, B. Fasting blood sugar > 126mg/dl and post prandial blood sugar > 199mg/dl, C. HbA1C = 5.5%, D. Fasting blood sugar > 70mg/dl', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The WHO recommendations for the diagnostic criteria for diabetes:Fasting plasma glucose: >/= 126mg/dlor2-hour plasma glucose: > 200mg/dlRef: Park; 23rd ed; Pg 395', 'role': 'assistant'}]