What is the genus of the sunflower?

Which system is used to provide scientific names to plants?

Which of the following represents the correct scientific name of the mango?

What is a species?

In which of the following are the works of Bentham and Hooker $NOT$ useful?

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.