Read the following sentences and choose correct sentences

$1.$ Dysentery, plague, diphtheria are caused by bacteria

$2.$ Salmonella typhi directly affect the respiratory system

$3.$ Amoebiasis and Ascariasis are caused by contaminated water

$4.$ Internal bleeding, anemia muscular pain are symptoms of elephantiasis

Signs of mental illness are

Which one of the following organisms is scientifically correctly named, correctly printed according to the International Rules of Nomenclature and correctly described ?

Recently discovered anti-cancer drug is obtained from

Select the correct statement from the ones given below.