In which stage of pertussis is the characteristic whooping sound made?

convalescence

catarrhal

paroxysmal

prodromal

paroxysmal

Explanation:

Pertussis is highly contagious and acute respiratory disease which is caused by bacteria Bordetella pertussis.

The disease has 3 types of stages which are catarrhal stage, paroxysmal stage, and convalescent stage.

The paroxysmal stage of the Pertussis is characterized by the episodes of the coughing with a distinctive sound which is known as whopping during the process of inspiration.

This type of cough gives disease the common name which is called Whooping Cough.