This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthesia, Subject name: Pharmacology
[{'content': 'The fall in blood pressure caused by d-tubocurarine is due to: \nSelect and explain. \nA. Reduced venous return, B. Ganglionic blockade, C. Histamine release, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: d-tubocurarine :- - is a competitive NM blocker. It produces fall in BP due to:- - causes Blockade of sympathetic ganglia. - causes Histamine release. - Reduced venous return as a result of paralysis of limb and respiratory muscles.', 'role': 'assistant'}]