True about nerve fiber C is
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
Most susceptible to hypoxia
Unmyelinated
Preganglionic autonomic
Not for temperature and pain senses