This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'The following drug inhibits histamine release \nSelect and explain. \nA. D tubocurare, B. Morphine, C. Suxamethonium, D. Ketotifin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ketotifen, nedocromil are mast cell stabilizers inhibiting the release of histamine.remaining all options given are histamine releasersRef: KD Tripathi 7th ed pg 229', 'role': 'assistant'}]