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': 'For obesity BMI should be:- \nSelect and explain. \nA. >=20, B. >=40, C. >=50, D. >=30', 'role': 'user'}, {'content': 'Answer: D \nExplanation: park25th edition pageno:-428 classification BMI RISK OF COMORBIDITIES UNDERWEIGHT <18.5 LOW NORMAL RANGE 18.5-24.99 AVERAGE OVERWEIGHT: >25.00 Pre- obese 25.00-29.99 INCREASED Obese class 1 30.00-34.99 MODERATE Obese class 2 35.00-39.99 SEVERE Obese class 3 >40.00 VERY SEVERE', 'role': 'assistant'}]