This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
[{'content': 'Which of the following is not used for throm-bopro phylaxis: \nSelect and explain. \nA. Heparin, B. Warfarin, C. Antithrombin III, D. Aspirin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Antithrombin is a peptide that is synthesised in the liver and circulates in the plasma . Other three are drugs that can be used prophylactically. From medical pharmacology padmaja 4th edition Page no 334', 'role': 'assistant'}]