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': 'Vascular sign of narath is seen in - \nSelect and explain. \nA. Dislocation of hip, B. Dislocation of knee, C. Dislocation of elbow, D. Dislocation of shoulder', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Dislocation of hip Vascular sign of Narath* Normally femoral pulse is felt in the groin against head of the femur.* In posterior dislocation of hip the vessels fall back unsupported, so femoral arterial pulsation, which is felt against the head of the femur will be feeble or even, may not be palpable.", 'role': 'assistant'}]