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
Which of the NSAID can be used by parenteral route? 
Select and explain. 
A. Ibuprofen, B. Ketorolac, C. Naproxen, D. Fenoprofen
B: Ketorolac
Answer: B: Ketorolac 
Explanation: None