$A$ group of families constitutes a/an ......... .

Which taxonomic category is formed by a group of closely related species?

Match the following columns correctly:

Common Name	Scientific Name / Order / Family
$A$. Earthworm	$R$. Pheretima posthuma,$Y$. Opisthopora,$3$. Megascolecidae
$B$. Sunflower	$S$. Helianthus annuus,$Z$. Asterales,$2$. Asteraceae
$C$. Frog	$P$. Rana tigrina,$X$. Anura,$4$. Ranidae
$D$. Maize	$Q$. Zea mays,$W$. Glumiflorae,$1$. Poaceae

In the zoological name of an organism,the first word represents the:

Match the common name given in column $I$ with their taxonomic category order given in column $II$ and choose the correct combination from the options given below.

Column-$I$ (Common name)	Column-$II$ (Taxonomic category-Order)
$A$. Wheat	$I$. Primata
$B$. Mango	$II$. Diptera
$C$. Housefly	$III$. Sapindales
$D$. Man	$IV$. Poales

How many species can a genus include?