<prompt> Injury to popliteal artery in fracture lower end of femur can be caused by -Proximal fragmentMuscle haematomaDistal fragmentTissue swelling  <response>: Ans. is C i.e., Distal fragment o In distal third shaft fracture or supracondylar femur fracture, the distal fragment is tilted backward due to strong gastrocnemius pull. o This posteriorly tilted distal fragment can cause popliteal artery injury. 