This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cell Wall Synthesis Inhibitors, Subject name: Pharmacology
[{'content': 'Drug of choice for Clostridium difficile infection is \nSelect and explain. \nA. Vancomycin, B. Metronidazole, C. Ceftriaxone, D. Clindamycin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Drugs used for Clostridium difficile infection are DOC is oral Vancomycin Alternatives are metronidazole and fidoxamicin Monoclonal antibody against Clostridium toxin is bezlotoxumab.', 'role': 'assistant'}]