This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Given below is a clinical feature often associated with a tumour, what is the tumour? NOT RELATED-PATHOLOGY \nSelect and explain. \nA. Grottons papules, B. Acanthosis nigricans, C. Hyperophic osteoahropathy, D. Dermatomyositis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]