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: Surgery
An intern was doing saphenous cannulation for a bum patient. Then the patient developed sudden onset of pain along the medial border of the corresponding foot. Which nerve must have beenaccidentally ligated- 
Select and explain. 
A. Sural nerve, B. Deep peroneal nerve, C. Saphenous nerve, D. Genicular nerve
C: Saphenous nerve
Answer: C: Saphenous nerve 
Explanation: Sensory supply of medial border of foot is saphenous nerve.