Salmonella is related with

What is the cause of infection in the alveoli of the lungs in human pneumonia?

What are the causative agents and symptoms of pneumonia?

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 $:$

$A$ : Anthrax is caused by a bacterium.
$R$ : Anthrax develops only in buffaloes and cannot be transferred to humans.

Which bacteria is responsible for typhoid?