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: Ophthalmology
[{'content': 'Topical antifungal in fusarium infections is: \nSelect and explain. \nA. Silver sulfadiazine, B. Natamycin, C. Ketoconazole, D. Flucytosine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Natamycin', 'role': 'assistant'}]