<prompt> An elderly woman was admitted with a fracture of the neck of right femur which failed to unite. On examination an avascular necrosis of the head of femur was noted. The condition would have resulted most probably from the damage toSuperior gluteal aeryInferior gluteal aeryAcetabular branch of obturatorRetinacular branches of circumflex femoral aeries  <response>: The major blood supply of femoral head is by lateralsuperior retinacular branch of medial circumflex aery. REF : MAHESWARI 9TH ED 