The final stage of drug addiction is represented by the need of drug for the body. This is known as
Drug dependency
Drug immunity
Drug resistancy
None of these
It constitutes about $50$ percent of the lymphoid tissue in human body.
Filaria, malaria, dengue fever, sleeping sickness, yellow fever are transmitted by
Which virus, for the first time, was synthesised in the form of non-living crystals
Koch's postulates are not applicable to
Except skin, other physical barriers which also helps to prevent the entry of the microorganisms are
$I.$ mucus coating of the epithelium lining the respiratory
$II.$ gastrointestinal tracts
$III.$ urogenital tracts
Choose the correct option