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: Pharmacology
Central muscle relaxants act by - 
Select and explain. 
A. Decreased nerve conduction, B. Inhibits spinal polysynaptic reflexes, C. Block conduction across NM junction, D. CNS depression
B: Inhibits spinal polysynaptic reflexes
Answer: B: Inhibits spinal polysynaptic reflexes 
Explanation: Ans. is 'b' i.e., Inhibits spinal polysynaptic reflexes Centrally acting muscle relaxants selectively depress spinal and supraspinal polysynaptic reflexes involved in the regulation of muscle tone without significantly affecting monosynaptic mediated stretch reflex.