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
Antiplatelet drug which inhibits cyclo-oxygenase 1 enzyme is? 
Select and explain. 
A. Aspirin, B. Clopidogrel, C. Tirofiban, D. Dipyridamole
A: Aspirin
Answer: A: Aspirin 
Explanation: Ans. is 'a' i.e., Aspirin