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. Posterior dislocation of hip, B. Sub trochantric fracture of hip, C. Anterior dislocation of hip, D. Central dislocation of hip', 'role': 'user'}, {'content': "Answer: A \nExplanation: ANSWER: (A) Posterior dislocation of hipREF: Apley's 8th ed p. 681Vascular sign of narath is positive in posterior dislocation of hip joint. Due to posterior dislocation, the hipjoint falls on the femoral artery, and this causes feeble or absent femoral pulse.", 'role': 'assistant'}]