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
Which fungal infection is commonest to occur in neutropenia - 
Select and explain. 
A. Candida, B. Histoplasma, C. Aspergillus niger, D. Aspergillus fumigatus
A: Candida
Answer: A: Candida 
Explanation: None