Final answer:
Aspirin is the correct option because it inhibits the enzymes involved in pain and inflammation.
Step-by-step explanation:
The subject of this question is Biology, specifically related to the action of nonsteroidal anti-inflammatory drugs (NSAIDs) on prostaglandin synthesis in the central nervous system (CNS).
In this case, the correct option would be Aspirin (Option 2).
Aspirin works by inhibiting the enzymes cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) involved in pain and inflammation. It deactivates the COX enzyme by transferring an acetyl group to the hydroxyl group of the active site of the enzyme, preventing the conversion of arachidonic acid into prostaglandins. This inhibition of prostaglandin synthesis relieves pain and reduces inflammation.