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': 'In patient with listeria meningitis who is allergic to penicillin the treatment of choice is - \nSelect and explain. \nA. Vancomycin, B. Gentamycin, C. Trimethoprim-sulphamethoxazole, D. Ceftriaxone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]