Which of the following is used as a disinfectant?

Match the following.

Column $I$	Column $II$
$A$. Analgesic	$I$. Phenelzine
$B$. Tranquilizer	$II$. Terfenadine
$C$. Antibiotic	$III$. Codeine
$D$. Antihistamine	$IV$. Prontosil

$A$ $16$-year-old boy visits a doctor complaining of sneezing,watery eyes,and a runny nose,along with constant itching in the eyes. He also has a known allergy to dust. Which medicine will the doctor recommend?

Stearic acid and polyethylene glycol react to form which one of the following soaps/detergents?

Both antacids and antiallergic drugs are antihistamines but they cannot replace each other. Explain why?

Chloramine-$T$ is a