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: Medicine
[{'content': 'Aggravation of myasthenia is a feature of all the following drugs except - \nSelect and explain. \nA. Gentamicin, B. Neomycin, C. Edrophonium, D. Succinyl', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]