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
All of the following Beta–Lactam antibiotics possess antipseudomonal action, except : 
Select and explain. 
A. Piperacillin, B. Ceftriaxone, C. Ceftazidime, D. Cefoperazone
B: Ceftriaxone
Answer: B: Ceftriaxone 
Explanation: None