This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower limb, Subject name: Anatomy
Blood supply of femoral head is 
Select and explain. 
A. Femoral aery, B. Obturator aery, C. Internal pudendal aery, D. Lateral circumflex aery
B: Obturator aery
Answer: B: Obturator aery 
Explanation: BLOOD SUPPLY OF FEMORAL HEAD:- The head of femur is paly supplied by a branch of obturator aery along the ligamentum teres.Main aerial supply is from retinacular aeries, branch of medial circumflex femoral aery.These aeries get injured in intracapsular fracture neck of femur, leading to avascular necrosis of the head. In such cases hip joint need to be replaced. {Reference: BDC 6E pg no.19}