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
A patient on aspirin will have increase in : 
Select and explain. 
A. Bleeding time, B. Clotting time, C. Prothrombin time, D. Activated partial thromboplastin time:
A: Bleeding time
Answer: A: Bleeding time 
Explanation: Antiplatelet drugs (like aspirin and clopidogrel) prolong the bleeding time.
AnticoaguIant drugs prolong the clotting time.
Drugs interfering with Intrinsic pathway (like heparin) prolong the aPTT
Drugs Interfering with extrinsic pathway (like warfarin) prolong the PT
Thrombin time is prolonged in cases of afibrinogenemia and dysfibrinogenemia.