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
[{'content': 'Which of the following antibiotic is used in the treatment of Clostridium difficile associated diarrhoea? \nSelect and explain. \nA. Ciprofloxacin, B. Metronidazole, C. Piperacillin, D. Clindamycin', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Metronidazole o Metronidazole is the DOC for clostrdium difficle associated diarrhoea. o Alternative drugs are vancomycin, fusidic acid, teicoplanin, and bacitracin.", 'role': 'assistant'}]