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: Physiology
First change observed in distal pa, of a cut nerve is : 
Select and explain. 
A. Axonal degeneration, B. Sprouting, C. Myelin degeneration, D. Schawn cells proliferation
A: Axonal degeneration
Answer: A: Axonal degeneration 
Explanation: A i.e. Axonal degeneration