What is the family of mango $(Mangifera \text{ } indica)$?

$A$ branch of botany concerned with the classification,nomenclature,and identification of plants is $:-$

Which of the following $statement(s)$ is/are not correct?
$(i)$ Genus comprises a group of related species which has more characters in common in comparison to species of other genera.
$(ii)$ Three different genera such as $Solanum$,$Datura$ and $Petunia$ are placed in the family $Malvaceae$.
$(iii)$ In case of plants,classes with a few similar characters are assigned to a higher category called phylum.

How many species can a genus include?

The nomenclature of living organisms is done by following $............$.

$Order$ is the assemblage of families which exhibit a few similar characters.