This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pathophysiology of Burn and Inhalation Injury, Subject name: Surgery
In burns , back constitutes how much %- 
Select and explain. 
A. 9%, B. 18%, C. 36%, D. 13.50%
B: 18%
Answer: B: 18% 
Explanation: Ans. is 'b' i.e., 18%