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
Asprin is not given in a patient who is already on heparin because aspirin causes : 
Select and explain. 
A. Platelet dysfunction, B. Aspirin inhibits the action of heparin, C. Enhanced hypersensitivity of heparin, D. Therapy of heparin cannot be monitored
A: Platelet dysfunction
Answer: A: Platelet dysfunction 
Explanation: None