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
The antibiotic causing pseudomembrane colitis is-Clindamycin 
Select and explain. 
A. Clindamycin, B. Garamycin, C. Erythromycin, D. Vancomycin
C: Erythromycin
Answer: C: Erythromycin 
Explanation: Ans. is 'c' i.e., Clindamycin o Pseudomembranous enterocolitis is caused most commonly by 2nd generation cephalosporins, clindamycin ampicillin, and fluoroquinolones.