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 antimicrobial is effective against an organism producing extended spectrum beta lactamase: 
Select and explain. 
A. Amoxicillin–Clavulanic acid., B. Cefepime, C. Piperacillin-Tazobactam., D. Ceftriaxone.
C: Piperacillin-Tazobactam.
Answer: C: Piperacillin-Tazobactam. 
Explanation: None