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
A 3 year old child suffers from burn injury with the following body parts involved: face including scalp, both buttocks and circumferentially around both thighs. How much is TBSA involved? 
Select and explain. 
A. 0.25, B. 0.26, C. 0.35, D. 0.45
C: 0.35
Answer: C: 0.35 
Explanation: Using Modified Lund-Browder chart: