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': 'Which fungal infection is commonest in neutropenia? \nSelect and explain. \nA. Candida, B. Histoplasma, C. Aspergillus niger, D. Aspergillus fumigatus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Candida . Cell mediated immune responses, especially CD4 cells, are impoant in controlling mucocutaneous candidiasis. . The neutrophil is probably crucial for resistance to systemic candidiasis.", 'role': 'assistant'}]