This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
D Tubocurarine acts by 
Select and explain. 
A. Inhibiting nicotinic receptors at myoneural junction, B. Inhibiting nicotinic receptors at autonomic ganglion, C. Producing depolarising block, D. By inhibiting re-uptake of acetyl choline
A: Inhibiting nicotinic receptors at myoneural junction
Answer: A: Inhibiting nicotinic receptors at myoneural junction 
Explanation: Refer Katzung 10/e p 429 D-Tubocurarine is a skeletal muscle relaxant that acts by competitive inhibition of NM receptors at neuron muscular junction