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. Decreasing nerve conduction, B. Inhibiting spinal polysynaptic reflexes, C. Blocking conduction across NM junction, D. Causing CNS depression
B: Inhibiting spinal polysynaptic reflexes
Answer: B: Inhibiting spinal polysynaptic reflexes 
Explanation: None