This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
Fibers more susceptible to hypoxia are: 
Select and explain. 
A. Preganglionic, B. Postganglionic, C. Both, D. None
A: Preganglionic
Answer: A: Preganglionic 
Explanation: Preganglionic nerve fibers are more susceptible to hypoxia Ref:Guyton and Hall textbook of medical physiology 12th edition ,pag number:72,73