<prompt> Which of the following drug is a selective COX-2 inhibitor?KetorolacEtoricoxibPiroxicamNimesulide  <response>: Ref: Katzung 14th ed. P 323, 647Non-steroidal anti-inflammatory drugs classificationSelective COX-2 Inhibitor CoxibsNon-selective COX-1 and 2 inhibitor Celecoxib Etoricoxib Valdecoxib Rofecoxib Parecoxib Indomethacin Ibuprofen Naproxen Piroxicam Aspirin Ketoprofen 