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
Which of the following topical agent boosts cell - mediated immunity in burns 
Select and explain. 
A. Mafenide acelate, B. Silver nitrate, C. Cerium nitrate, D. Povidone iodine
C: Cerium nitrate
Answer: C: Cerium nitrate 
Explanation: Cerium nitrate boosts cell - mediated immunity and forms sterile eschar in burns.