Which vaccine is used for typhoid?

Assertion: $Escherichia$ $coli$,$Shigella$ $sp.$ and $Salmonella$ $sp.$ are all responsible for diarrhoeal diseases.
Reason: Dehydration is common to all types of diarrhoeal diseases and adequate supply of fluids and electrolytes should be ensured.

The bacterium $Streptococcus$ $pneumoniae$ (pneumococcus) is responsible for which of the following diseases?

Which disease is caused by $Haemophilus$ $influenzae$?

Which of the following is $Xanthomonas$ related to?

Which of the following is a preventive measure to avoid $Pneumonia$?