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': 'True about myasthenia gravis - \nSelect and explain. \nA. Associated with thymomoa in 3/4 of cases, B. Incremental response seen with repetitive electric stimuli, C. Skeletal muscle function improve after rest, D. ↑ Aceytylcholine receptor', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]