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 affects the wound healing most: 
Select and explain. 
A. Cortisol, B. Growth hormone, C. Thyroxin, D. Adrenaline
A: Cortisol
Answer: A: Cortisol 
Explanation: None