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
Underlying internal malignancy is not shown by 
Select and explain. 
A. Acanthosis nigricans & Annular erythema, B. Bullous pyoderma & migratory necrotizing erythema, C. Granuloma annulare, D. Erythema gyratum repens
C: Granuloma annulare
Answer: C: Granuloma annulare 
Explanation: C i.e. Granuloma annulare