This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Most common fungus causing otomycosis is 
Select and explain. 
A. Histoplasma, B. Candida, C. Mucor, D. Penicillin
B: Candida
Answer: B: Candida 
Explanation: Otomycosis is a fungal infection of the ear canal most commonly caused by Candida albicans, Aspergillus niger and Aspergillus fumigatus. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, of no. 55)