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
[{'content': "Most common cause of SNHL \nSelect and explain. \nA. Labyrinthitis, B. Presbycusis, C. Meniere's disease, D. Vestibular Schwannoma", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Presbycusis - Most common cause of SNHL. A/W physiological aging process in the ear Bilateral slopping curve Usually manifests at the age of 65 years, (old age) but may do so early if there is a hereditary predisposition, chronic noise exposure or generalized vascular disease.', 'role': 'assistant'}]