Which of the Following Choices Describes a Rotationplasty

Which of the following choices describes a rotationplasty?

A) A custom-made rotating hinge prosthesis is implanted at the knee.
B) The leg is amputated above the knee, and the tibia bone from the lower leg is inverted, making it possible for the ankle end of the tibia to be fused to the bottom of the femur.
C) The tibia is resected, and the ankle joint is fused to the distal tibia at 180 degrees.
D) The surgeon removes the affected bone in the femur, rotates the lower portion of the leg 180 degrees so that the foot faces in the opposite direction, and reattaches it to the upper femoral area.