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
Among NSAIDs aspirin is unique because it : 
Select and explain. 
A. Irreversibly inhibits its target enzyme, B. Reduces the risk of colon cancer, C. Reduces fever, D. Selectively inhibits COX-2 enzyme
A: Irreversibly inhibits its target enzyme
Answer: A: Irreversibly inhibits its target enzyme 
Explanation: None