The correct option is (a) ASA
The best I can explain: Anti-inflammatory drugs are of five kinds and these are salicylates, phenylpropionic acids, pyrazalone derivatives, indole derivatives and disease modifying drugs. Salicylates e.g., ASA, phenylpropionic acids e.g., ibuprofen, ketoprofen, pyrazalone derivatives e.g., phenylbutazone, indole derivatives e.g., indomethacin, disease modifying drugs: e.g. chloroquine.