Citrus canker is a:

Salmonella typhosa causes

Given below are two statements $:$
Statement-$I$ : Typhoid fever can be confirmed by the Widal test.
Statement-$II$ : Intestinal perforation and death may occur in severe cases of typhoid.
In the light of the above statements,choose the correct answer from the options given below $:$

Haemophilus influenzae is responsible for.........

Infection of pneumonia occurs due to

Identify the mismatched pair among the following viral diseases.