This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
As per 'rule of nine' each lower limb is 
Select and explain. 
A. 9%, B. 18%, C. 27%, D. 36%
B: 18%
Answer: B: 18% 
Explanation: Each upper limb is 9% TBSA, Each lower limb 18%, (front 9%, Back 9%)Chest 18% (front 9%, Back 9%)Abdomen 18% (front 9%, Back 9%)The head and neck 9%Perineum 1%Ref: Bailey and love 27e pg: 621