This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Pharmacology
[{'content': 'Mechanism of action of d-tubocurarine is \nSelect and explain. \nA. Competitive, nondepolarizing block at the Nm cholinergic receptor, B. Non - competitive, nondepolarizing block at the Nm cholinergic receptor, C. Competitive, depolarizing block at the Nm cholinergic receptor, D. Noncompetitive, depolarizing block at the Nm cholinergic receptor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Depolarizing MR - Succinylcholine | - Shoest acting MR - C/I in nerve and muscle injury because it can cause | K+ - Hypehermia can occur. - It causes fasciculations responsible for post-operative muscle pain. Non - Depolarizing or competitive MR d- Tubocurarine - It releases lot of histamine that leads to vasodilation and bronchoconstriction. It competitively inhibit the Nm receptor.', 'role': 'assistant'}]