Diphtheria is caused by
Bacteria
Virus
Nematodes
None of these
The disease ‘pneumonia’ is caused by
Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.
Salmonella typhosa causes
Which one of the following sets includes the bacterial disease
$A$ : Typhoid carriers may be cured by surgical removal of their gall bladder.
$R$ : The disease germs remain concentrated in it.