This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: ENT
Otomycosis is most commonly caused by: 
Select and explain. 
A. Actinomycetes, B. Aspergillus niger, C. Mucor, D. Candida albicans
B: Aspergillus niger
Answer: B: Aspergillus niger 
Explanation: Otomycosis/Singapore ear, fungal common causative organism aspergillus niger Other cause - Aspergillus fumigatus Candida albicans c/f - severe itching & hearing, discharge, mild pain o/p - wet blotting paper / wet newspaper appearance of the tympanic membrane Tx - topical antifungal ear drops X 4 weeks aural toilet by micro suction.