Assertion : Dope test is used to estimate the level of blood alcohol by analyzing the breath of persons drinking alcohol.

Reason : A drunken person usually feels tense and less talkative.

$A$ : It is considered advantageous to give the polio vaccine orally.
$R$ : It prevents reinfection by causing intestinal immunity

Who discovered malarial parasite

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

Which one of the following is not a matching pair of a drug and its category ?