Which of the following are unmyelinated nerve fibers?: (A) Proprioceptive fibers, (B) Motor neuron to muscle, (C) Postganglionic sympathetic fibers, (D) Motor nerve to intrafusal fibers
Answer is C. Ans. is 'c' i.e., Postganglionic sympathetic fibers[Ref Ganong 24h/e p. 92; Principles of medical physiology p. 5I2lType C fibers are unmyelinated fibers which include postganglionic autonomic fibers,