Which is NOT true about fractured neck of femurs?

• A. the leg is shortened and externally rotated in most fractured neck of femurs
• B. the main source of blood to the femoral head is via the vessels running within cancellous bone from the diaphysis
• C. a subcapital fracture cuts off all the blood to the head of the femur resulting in avascular necrosis
• D. the blood supply to the head is increased by vessels in the capsular retinacula and it is this which prevents avascular necrosis of the head after an intertrochanteric fracture
• E. the ligamentum teres attaches to the central fovea???? on the femoral head and originates from the acetabulum