<prompt> Palpatory thud, audible slap is seen inTracheal foreign bodyBronchial foreign bodyLaryngeal foreign bodyNone  <response>: 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 patients open mouth. Ref: PL Dhingra 7th edition of Ear, Nose and Throat; Pg no 365 