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
True about nerve fiber C is 
Select and explain. 
A. Most susceptible to hypoxia, B. Unmyelinated, C. Preganglionic autonomic, D. Not for temperature and pain senses
B: Unmyelinated
Answer: B: Unmyelinated 
Explanation: SPECIAL FEATURES
1)  Susceptibility to 
A) Hypoxia                     B > A > C
B) Pressure                    A > B > C
C) Local Anasthesia      C > B > A
2) Diameter
A alpha > A beta > A gamma > A delta > B > C
3) Velocity
A alpha > A beta > A gamma > A delta > B > C
4) a)Large axons are associated with  

Proprioception
Somatic motor
Touch
Pressure

b) Small axons are associated with 

Pain
Temperature
Autonomic function

5) a) Velocity is directly dependent on

Myelination, Diameter and capacitance

b) Velocity is inversely dependent on

Resistance