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': 'All of the following are anticoagulant ,except \nSelect and explain. \nA. Phytonadione, B. Warfarin, C. LMW heparin, D. Lepirudin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Phytonadione is Vit K. All others are anti coagulants. From essential of medical pharmacology K D Tripati 7th edition Page no 613', 'role': 'assistant'}]