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: Medicine
Drug of choice in pseudomonas septicemia is - 
Select and explain. 
A. Methicillin, B. Cellazidime, C. Moxalatum, D. Piperacillin
D: Piperacillin
Answer: D: Piperacillin 
Explanation: None