This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Larynx, Subject name: ENT
[{'content': 'Heimlich&;s maneuver is used in \nSelect and explain. \nA. Upper airway obstruction by foreign body, B. BPPV, C. Eustachian tube patency test, D. Tympanic membrane integrity test', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Heimlich maneuverAbdominal thrusts also called the Heimlich maneuver, is a first aid procedure used to treat upper airway obstruction (or choking) by foreign objects. The Heimlich maneuver is named after Dr. Henry Heimlich, who first described it in 1974.Ref: PL Dhingra, Diseases of Ear, Nose & Throat, 7th edition, pg no. 367', 'role': 'assistant'}]