This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Drug used in aneliorative test for Myasthenia gravis is \nSelect and explain. \nA. Physostigmine, B. Edrophonium, C. Tacrine, D. Pyridostigmine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Drug used in amellorative test (tensilon test) for myasthena gavis is edrophonium. It is a cholinergic drug and can be used for diagnosis of myasthenia gravis becaise of its sho duration of action (10-30 min) Ref-KDT 6/e p104', 'role': 'assistant'}]