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. >=50, C. >=40, D. >=30
D: >=30
Answer: D: >=30 
Explanation: Ref-Park&;s textbook of preventive and social medicine 24th edition. .