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: Anatomy
A pt. presents with defective adduction of the hip joint and pains in the hip and knee joint. Which nerve is involved 
Select and explain. 
A. Obturator nerve, B. Femoral nerve, C. Saphenous nerve, D. Sciatic nerve
A: Obturator nerve
Answer: A: Obturator nerve 
Explanation: A. i.e. Obturator nerveAdductors of thigh are mainly supplied by obturator nerveQ.A disease in hip joint may cause referred pain in knee & medial thigh because of their common nerve supply by obturator nerveQ.