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': 'Obesity is defined as if BMI is - \nSelect and explain. \nA. >20, B. >50, C. > 40, D. >30', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., > 30 Classification of adults according to BMIClassificationBMIRisk of comorbiditiesUnderweight<18-50Low (but risk of other clinical problems increased)Normal range18-50-24-99AverageOverweight:>25-00 Pre-obese25-00-29-99IncreasedObese class I30-00-34-99ModerateObese class II35-00-39-99SevereObese class III>40 00Very severe", 'role': 'assistant'}]