This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: mycology, 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: Candida - chronic mucocutaneous candidiasis is a serious manifestation seen in immunodeficiency states. Candida albicans is the normal inhabitant of skin, GIT, oral and vaginal cavities. Candidiasis is an oppounistic endogenous infection. Ref: Textbook of Microbiology, Ananthanarayan and Paniker; 9th edition .', 'role': 'assistant'}]