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
Which is the most common site of Necrobiosis lipoidica diabeticorum? 
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: Necrobiosis lipoidica diabeticorum appear most commonly over the tibial shin. It is seen more frequently in type 1 than in type 2 diabetes and may occur before the onset of clinical diabetes. It is more commen in women than in men. It is characterized by yellow - red to brown, translucent shiny patches and plaques that slowly enlarge over months to years resulting in epidermal atrophy and telengiectasia.