What distinguishes India from Scandinavian countries in terms of biodiversity?

Given below are two statements.
Statement-$I$: Genetic diversity is the diversity in the number and type of genes as well as chromosomes present in the same species and variations in the genes and their alleles.
Statement-$II$: Species diversity deals with the variety of species as well as the number of individuals of different species observed in an area.
In light of the above statements,select the correct answer from the options given below.

In which regions does the plant $Rauwolfia \text{ vomitoria}$ show genetic diversity?

Where is the greatest biodiversity on Earth found?

$A$ : India falls under the Oriental realm out of the major biogeographical realms.
$R$ : The world is divided into six biogeographical realms.

If there were $50$ species of reptile present in one ecosystem,what is this called?