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: ENT
Myringitis bullosa is caused by - 
Select and explain. 
A. Common causes of otitis externa -, B. Fungus, C. Bacteria, D. Virus
D: Virus
Answer: D: Virus 
Explanation: Myringitis bullosa hemorrhagica is a painful condition.
It is characterized by formation of hemorrhagic blebs on tympanic membrane and deep meatus. It is probably caused by virus or mycoplasma pneumoniae
(Dhingra 6/e, p 62) but according to Turner 10/e p 323