This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': 'Palpatory thud, audible slap is seen in - \nSelect and explain. \nA. Tracheal foreign body, B. Bronchial foreign body, C. Laryngeal foreign body, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Tracheal foreign body o A foreign body in trachea may move up and down the trachea between the carina andd the undersurface of the vocal cords causing "audible slap" and "palpatory thud". o Symptoms and signs of foreign bodies at different levels :# Larynx# Trachea', 'role': 'assistant'}]