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
All are antiplatelet drugs Except 
Select and explain. 
A. Aspirin, B. Clopidogrel, C. Dipyridamole, D. Warfarin
D: Warfarin
Answer: D: Warfarin 
Explanation: Warfarin is an oral anticoagulant. All the others are anti platelet drugs. From medical pharmacology padmaja 4th edition Page no 341,343