Which rules must animal taxonomists follow?

Select the correct option for $Panthera$ $leo$,$Panthera$ $pardus$,and $Panthera$ $tigris$.

In the taxonomic hierarchy,which of the following groups of taxa will have the fewest number of similarities compared to the others?

Which of the following is a class that does not contain an order?

Two similar holotypes are called

Assertion $A$: Linnaeus is known as the father of taxonomy.
Reason $R$: Linnaeus classified plants into $24$ groups based on floral characteristics.
Which option is correct for Assertion $A$ and Reason $R$?