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
Drug of choice for Clostridium difficile infection is 
Select and explain. 
A. Vancomycin, B. Metronidazole, C. Ceftriaxone, D. Clindamycin
A: Vancomycin
Answer: A: Vancomycin 
Explanation: Drugs used for Clostridium difficile infection are DOC is oral Vancomycin Alternatives are metronidazole and fidoxamicin Monoclonal antibody against Clostridium toxin is bezlotoxumab.