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
Unilateral sensorineural hearing loss may occur in- 
Select and explain. 
A. Coronavirus, B. Mumps, C. Pertussis, D. Rotavirus
B: Mumps
Answer: B: Mumps 
Explanation: Ans. is 4b' i.e., Mumps o Unilateral sensorineural hearing loss may occur in mumps due to involvement of the labyrinth, o Sudden deafness has been noticed.Acquired causes of SNHLo Infections of labyrintho Trauma to labyrinth or VIII nerve (Head injury, surgery etc)o Noise induced hearing losso Ototoxic drugso Presbycusiso Meniere's diseaseo Acoustic neuromao Sudden hearing losso Systemic disorders (DM, Hypothyroidism, Renal disorders)o Multiple sclerosiso Smoking & Alcoholism