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': 'Which of the following is not a hard sign of aerial injury? \nSelect and explain. \nA. Expanding or pulsatile hematoma, B. Aerial bleeding, C. Shock, D. Bruit', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. ShockHard signsDistal circulatory deficitIschaemiaAbsent or diminished pulsesBruitExpanding or pulsatile hematomaAerial bleeding', 'role': 'assistant'}]