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 following drugs is useful against Pseudomonas? 
Select and explain. 
A. Piperacillin-Tazobactam, B. Streptomycin, C. Cephalexin, D. Cefoxime
A: Piperacillin-Tazobactam
Answer: A: Piperacillin-Tazobactam 
Explanation: None