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 does not cause pseudomembranous enterocolitis ? 
Select and explain. 
A. Vancomycin, B. Levofloxacin, C. Clindamycin, D. Ceftazidime
A: Vancomycin
Answer: A: Vancomycin 
Explanation: Ans. is 'a' i.e., Vancomycin o Antibiotics associated with Pseudomembranous Colitis ? 1) Clindamycin 2) Ampicillin 3) Cephalosporins (Cefotaxime, Ceftriaxone, Cefuroxime, Ceftazidime) 4) Fluoroquinolones (Ciprofloxacin, Levofloxacin, Moxifloxacin)