This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscle relaxants, Subject name: Anaesthesia
D-tubocurarine acts by 
Select and explain. 
A. Inhibiting nicotinic receptors at myoneural junction, B. Inhibiting nicotinic receptors at autonomic ganglion, C. Producing depolarizing block, D. By inhibiting reuptake of acetylcholine
A: Inhibiting nicotinic receptors at myoneural junction
Answer: A: Inhibiting nicotinic receptors at myoneural junction 
Explanation: All non-depolarising blockers (D-Tubocurare) acts as a competitive antagonist of acetylcholine on nicotine (Nm) receptors at myoneural junction .