This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
All the following cephalosporins have significant activity against Pseudomonas Species except 
Select and explain. 
A. Cefoperazone, B. Ceftazidime, C. Cefotaxime, D. Cefepime
C: Cefotaxime
Answer: C: Cefotaxime 
Explanation: CephalosporinsActivity against PseudomonasCefoperazoneSome activityCeftazidimeMost activeCefotaximeNo activityCefepimeReasonable activity(Ref:Harrison's 17/e p952, 18/e p1269, table 152-2)