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
Obesity is defined as if BMI is - 
Select and explain. 
A. >20, B. >50, C. > 40, D. >30
D: >30
Answer: D: >30 
Explanation: 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