<prompt> Mullers manoeuvre is used toTo find out opening of mouthTo remove laryngeal foreign bodyTo find degree of obstruction in sleep disordered breathingTo remove foreign body from ear  <response>: Mullers manoeuvre is used to find level and degree of obstruction in sleep-disordered breathing with flexible nasopharyngoscope Ref: Textbook of ENT, Dhingra; 6th edition; Pg no: 449 ref img 