An organic compound that is commonly used for sanitizing surfaces is $.....$

Which of the following types of drugs reduces fever?

Penicillin is a/an ...... .

$A$ drug effective in the treatment of pneumonia,bronchitis,etc.,is

Veronal is a barbiturate drug used as a......

The statement/s which are true about antagonists from the following is/are :-
$A.$ They bind to the receptor site.
$B.$ Get transferred inside the cell for their action.
$C.$ Inhibit the natural communication of the body.
$D.$ Mimic the natural messenger.
Choose the correct answer from the options given below :-