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
Cephalosporin	active	against	pseudomonas
aeruginosa 
Select and explain. 
A. Cefoperazone, B. Cefaclor, C. Ceftriaxone, D. Cefotaxime
A: Cefoperazone
Answer: A: Cefoperazone 
Explanation: None