<prompt> The most common cause of laryngeal stridor in a 60 years old male is:Nasopharyngeal carcinomaAcute severe asthmaCarcinoma larynxReinkes edema  <response>: c Carcinoma larynxRef. Cummings, 6th ed., 1612At this age laryngeal stridor is most commonly caused by carcinoma of the larynx.Patients of nasopharyngeal carcinoma do not have stridor.Acute severe asthma will lead to wheeze.Patients of Reinkes edema have hoarseness and not stridor. 