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': 'Tourniquet test is carried out? \nSelect and explain. \nA. To know platelet count, B. To measure clotting time, C. To measure capillary-platelet interphase, D. To measure clot retraction', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]