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
For obesity BMI should be:- 
Select and explain. 
A. >=20, B. >=40, C. >=50, D. >=30
D: >=30
Answer: D: >=30 
Explanation: 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