This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pain Physiology, Subject name: Physiology
Pain is carried by w hich type of nerve fibres - 
Select and explain. 
A. aa, B. b, C. B, D. C
D: C
Answer: D: C 
Explanation: Ans. is 4d' i.e., C o Fast fibers carrying pain- Ad (fast pain)o Slow fibers carrying pain - C (slow pain)Functions of different fibreso Type A fibersA a- Proprioception, somatic motor (extrafusal fibers of muscle spindle).A b - Touch, pressure, kinestheticAg - Motor to intrafusal fibers of muscle spindleA d Pain, temperature, touch, pressureo Type B fibers - Preganglionic autonomico Type C fibers - Pain, temperature. Postganglionic autonomic (mainly sympathetic)