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': 'Anticoagulant of choice for heparin induced thrombocytopenia is? \nSelect and explain. \nA. Lepirudin, B. Low molecular weight heparin, C. Abciximab, D. Warfarin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Drug of choice for HIT syndrome are Direct thrombin inhibitor : Lepirudin. Direct Thrombin Inhibitor : Hirudin Lepirudin Bivalirudin Argatroban Melagatran Injectables Dabigatran : given orally Warfarin takes 4-5 days to manifest it's action.", 'role': 'assistant'}]