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
Axonotmesis includes discontinuity in: 
Select and explain. 
A. Perineurium, B. Epineuri um, C. Endoneurium, D. Axon
D: Axon
Answer: D: Axon 
Explanation: D i.e. Axon