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
Mechanism of action of asprin is : 
Select and explain. 
A. Inhibits COX–2 preferentially, B. Inhibits COX–1 preferentially, C. Inhibits COX 1 and COX 2 reversibly, D. Inhibits COX 1 and COX 2 irreversibly
D: Inhibits COX 1 and COX 2 irreversibly
Answer: D: Inhibits COX 1 and COX 2 irreversibly 
Explanation: None