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
Palpatory thud, audible slap is seen in 
Select and explain. 
A. Tracheal foreign body, B. Bronchial foreign body, C. Laryngeal foreign body, D. None
A: Tracheal foreign body
Answer: A: Tracheal foreign body 
Explanation: A sharp foreign body will only produce a cough and haemoptysis. A loose foreign body like seed may move up and down the trachea between the carina and the undersurface of vocal cords causing "audible slap" and "palpatory thud." Asthmatic wheeze may also be present. It is best heard at the patient's open mouth. Ref: PL Dhingra 7th edition of Ear, Nose and Throat; Pg no 365