This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'A patient on aspirin will have increase in : \nSelect and explain. \nA. Bleeding time, B. Clotting time, C. Prothrombin time, D. Activated partial thromboplastin time:', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Antiplatelet drugs (like aspirin and clopidogrel) prolong the bleeding time.\nAnticoaguIant drugs prolong the clotting time.\nDrugs interfering with Intrinsic pathway (like heparin) prolong the aPTT\nDrugs Interfering with extrinsic pathway (like warfarin) prolong the PT\nThrombin time is prolonged in cases of afibrinogenemia and dysfibrinogenemia.', 'role': 'assistant'}]