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: Skin
[{'content': 'Underlying internal malignancy is not shown by \nSelect and explain. \nA. Acanthosis nigricans & Annular erythema, B. Bullous pyoderma & migratory necrotizing erythema, C. Granuloma annulare, D. Erythema gyratum repens', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Granuloma annulare', 'role': 'assistant'}]