This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
How would a drug that competes with ACh for receptors at the motor end plate affect skeletal muscle? It would: 
Select and explain. 
A. Produce uncontrolled muscle spasms, B. Cause the muscles to contract and be unable to relax, C. Cause muscles to relax and be unable to contract, D. Make the muscles more excitable
C: Cause muscles to relax and be unable to contract
Answer: C: Cause muscles to relax and be unable to contract 
Explanation: Ref: KD Tripathi pharmacology 7th edition (page.no: 58) Anticholinergic drugs compete with acetylcholine for receptors at NM junction . Anticholinergic opposes the action of Ach causing relaxation of the muscle.