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: Microbiology
[{'content': "Cefoxitin - cycloserine fructose agar is used for ? \nSelect and explain. \nA. Neisseria, B. Clostridium difficle, C. Bacillus anttacis, D. Reiter's treponema", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Clostridium difficle Cefoxitin - cycloserine fructose agar (CCFA) is an enriched selective and differential medium recommended for the isolation and cultivation of clostridium difficle from fecal specimens.", 'role': 'assistant'}]