<prompt> The antibiotic causing pseudomembrane colitis is-ClindamycinClindamycinGaramycinErythromycinVancomycin  <response>: Ans. is c i.e., Clindamycin o Pseudomembranous enterocolitis is caused most commonly by 2nd generation cephalosporins, clindamycin ampicillin, and fluoroquinolones. 