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
[{'content': 'Otitic barotrauma results due to \nSelect and explain. \nA. Ascent in air, B. Descent in air, C. Linear acceleration, D. Sudden acceleration', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Otitic barotrauma is a nonsuppurative condition resulting from the failure of the eustachian tube to maintain middle ear pressure at ambient atmospheric level. The usual cause is rapid descent during an air flight, underwater diving or compression in a pressure chamber. Reference: Diseases of Ear, Nose and Throat, PL Dhingra, Shruthi Dhingra,7th edition, pg no.71', 'role': 'assistant'}]