This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'A clot size of a clenched fist indicates blood loss of approximately \nSelect and explain. \nA. 100 ml, B. 200 ml, C. 300ml, D. 500 ml', 'role': 'user'}, {'content': "Answer: D \nExplanation: Measurement of Blood Loss Clot size of a clenched fist is 500 ml. Blood loss in a closed tibial fracture is 500-1500 ml; in a fracture femur is 500-2000 ml. Weighing the swab before and after use is an impoant method of on-table assessment of blood loss. Ref: SRB's Manual of Surgery 6th edition Pgno :120", 'role': 'assistant'}]