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 Dermatomyositis -a) Gottron signb) ANA is positive in all casesc) All cases a/w internal malignancyd) Proximal muscle wastinge) Steroid maintenance \nSelect and explain. \nA. acd, B. bde, C. ade, D. ad', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]