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: Orthopaedics
[{'content': "Jumper's fracture is seen in - \nSelect and explain. \nA. Calcaneum, B. Tibia, C. Pelvis, D. Neck femur", 'role': 'user'}, {'content': "Answer: C \nExplanation: Jumper's fractures of the sacrum are characterized by an H - or U - shaped fracture line in the upper sacrum, usually involving the S1-S2\xa0region.\nTypical, the anterior segment of the pelvic ring is not injured.\nSo, Jumper's fracture involve the posterior segment of pelvic ring.", 'role': 'assistant'}]