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: Microbiology
Which one of the following drugs is antipseudomonal penicillin? 
Select and explain. 
A. Cephalexin, B. Cloxacillin, C. Piperacillin, D. Dicloxacillin
C: Piperacillin
Answer: C: Piperacillin 
Explanation: None