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
Most common site of Necrobiosis lipioidica dibeticorum is? 
Select and explain. 
A. Face, B. Neck, C. Front of leg, D. Back of leg
C: Front of leg
Answer: C: Front of leg 
Explanation: Front of leg REF: Rook's 8`h edition p. 60.13 Most common site of Necrobiosis lipioidica dibeticorum is pretibial skin, lesions may occur on trunk, penis or may be diffuse