This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Commonest complication of extra capsular fracture of femur is: September 2005 \nSelect and explain. \nA. Non union, B. Mal union, C. Avascular necrosis, D. Osteoahritis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Mal Union Complications of extra-capsular/ inter-trochanteric fracture: Union of the fracture in an unacceptable position resulting in a deformity/ malunion- the fracture heals with unacceptable shoening, rotation, and/or angulation of the extremity, resulting in decreased mobility and subsequent handicap, impairment, and disability. Rarely osteo-ahritis.', 'role': 'assistant'}]