This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
[{'content': 'Maximum histamine is released by \nSelect and explain. \nA. d Tubocurarine, B. Succinycholine, C. Pancronium, D. Gallamine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tubocurarine is a toxic alkaloid historically known for its use as an arrow poison.\nIn the mid-1900s, it was used in conjunction with an anesthetic to provide skeletal muscle relaxation during surgery or mechanical ventilation.', 'role': 'assistant'}]