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
Postganglionic sympathetic fibres are 
Select and explain. 
A. A alpha, B. C, C. B fibres, D. A gamma
B: C
Answer: B: C 
Explanation: The axons of postganglionic neurons are mostly unmyelinated C fibres and terminate on visceral effectors. Ref: Ganong&;s review of medical physiology; 23rd edition; pg:263.