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': 'Morbid obesity means BMI of \nSelect and explain. \nA. >30, B. >40, C. >35, D. >29', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: Park&;s Textbook of Preventive and Social Medicine 25 th Ed Pgno : 417-418', 'role': 'assistant'}]