This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Orthopaedics
Avascular necrosis of femur head is due to which of the following aery? 
Select and explain. 
A. Medial circumflex femoral aery, B. Lateral circumflex femoral aery, C. Obturator aery, D. Profunda femoris aery
A: Medial circumflex femoral aery
Answer: A: Medial circumflex femoral aery 
Explanation: Reticular aery branch of medial circumflex femoral aery supplies the head of femur. In case of femur neck fracture, this aery may be occluded leading to avascular necrosis of femur head.