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.

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