This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Head & neck involvement in burns in infant is ? 
Select and explain. 
A. 9%, B. 18%, C. 27%, D. 32%
B: 18%
Answer: B: 18% 
Explanation: Answer is 'b' i.e. 18% Children have a relatively larger poion of the body surface area in the head and neck which is compensated for by a relatively smaller surface area in the lower extremities. Infants have 21% of TBSA in the head and neck and 13% in each leg. The burn size, mentioned as a propoion of the patients TBSA (total body surface area) is the single most impoant factor in predicting burn related moality.