Potato and brinjal belong to the genus $Solanum$,which reflects that

What is a $Taxon$?

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 Division.

What is the genus of potato and brinjal?

In which of the following taxonomy is equal weightage given to each of thousands of characters that a taxon exhibits?

In the scientific name of $Mangifera$ $indica$ $L$.