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
BMI cut off for obesity is - 
Select and explain. 
A. 28, B. 30, C. 32, D. 40
B: 30
Answer: B: 30 
Explanation: Ref-Park&;s textbook of Preventive and Social Medicine 24th edition. .