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': 'A patient of acute leukemia is admitted with febrile neutropenia. On day four of being treated with broad-spectrum antibiotics, his fever increases. X-ray chest shows bilateral fluffy infiltrates. Which of the following should be the most appropriate next step in the managment - \nSelect and explain. \nA. Add antiviral therapy, B. Add antifungal therapy, C. Add cotrimoxazole, D. Continue chemotherapy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]