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
Commonest site of Necrobiosis Lipidoica Diabeticorum is: 
Select and explain. 
A. Face, B. Neck, C. Leg, D. Ann
C: Leg
Answer: C: Leg 
Explanation: Leg