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
Given below is a clinical feature often associated with a tumour, what is the tumour? NOT RELATED-PATHOLOGY 
Select and explain. 
A. Grottons papules, B. Acanthosis nigricans, C. Hyperophic osteoahropathy, D. Dermatomyositis
C: Hyperophic osteoahropathy
Answer: C: Hyperophic osteoahropathy 
Explanation: .