<prompt> In fracture of femur by which pa popliteal aery is commonly damaged by-Proximal fragmentDistal fragmentMuscle haematomaTissue swelling  <response>: In distal third shaft fracture or supracondylar femur fracture, the distal fragment is tilted backward due to strong gastrocnemius pull. This posteriorly tilted distal fragment can cause popliteal aery injury. Ref: Apleys 9the p. 865 