Assertion : Grographical isolation brings about sympatric speciation.
Reason : Reproductive isolation brings about allopatric speciation.

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are ture but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

D

Explanation

In allopatric speciation (species formation), a part of the population becomes geographically isolated from the main population. The population becomes entirely separated and finally constitutes a new species. In sympatric spciation, a small segment of the original population becomes isolated reproductively. as the isolating mechanisms comes into force, a new subspecies emerges. in due course of time a new species is formed.