This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerve supply of Lower Limb, Subject name: Anatomy
Marked dermatome is 
Select and explain. 
A. L4, B. L5, C. S1, D. S2
D: S2
Answer: D: S2 
Explanation: Dermatome supply of the marked area is S2