<prompt> Avascular necrosis of femur head is due to which of the following aery?Medial circumflex femoral aeryLateral circumflex femoral aeryObturator aeryProfunda femoris aery  <response>: 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. 