This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower Extremity, Subject name: Anatomy
Medial compartment of thigh is supplied by which nerve? 
Select and explain. 
A. Tibial nerve, B. Obturator nerve, C. Femoral nerve, D. Common peroneal
B: Obturator nerve
Answer: B: Obturator nerve 
Explanation: Ans. B Obturator nerveRef: Gray's Basic Anatomy E-book, P 205Obturator nerve is a branch of lumbar plexus.Related to ala of sacrum.Forms the lateral boundary of ovarian fossa.Emerges out of the obturator foramen and divides into anterior and posterior.Branches of Obturator NerveA. Anterior division: Gives off:# Muscular branches to 3 muscles: Adductor longus, adductor brevis and gracilis# Articular branch to the hip joint# Cutaneous branch to the skin of the medial side of the thigh.B. Posterior division: Gives off:# Muscular branches to 2 muscles# Obturator externus and adductor magnus (pubic part)# Articular branch to the knee joint.