This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries Around Hip, Subject name: Orthopaedics
[{'content': 'Radiological factors indicating an unstable pelvis are all except - \nSelect and explain. \nA. Posterior sacroiliac complex displacement by > lcm, B. Avulsion fracture of sacral or ischial end of the sacrospmous ligament, C. Avulsion fractures of the L5 transverse process, D. Isolated disruption of pubic symphysis with pubic diastasis of 2 cm.', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Isolated disruption of pubic symphysis with pubic diastasis of 2 cmo Radiographic factors indicating unstable pelvis arePosterior sacroiliac complex displacement by > l cmAvulsion fracture of sacral or ischial end of the sacrospinous ligamentAvailsion fractures of the L5 transverse processDisruption of pubic symphysis with pubic diastasis of 2 cm with posterior pelvic injury or injury to anterior/ posterior sacroiliac ligament or sacrospinous ligaments.Presence of gap rather than impaction in the posterior pelvic ring.", 'role': 'assistant'}]