Assertion : Due to continental drift, when South America joined North America, North American animals were overridden by South American fauna.
Reason : Due to the same continental drift, placental mammals of Australia survival because of lack of competition from any other mammal.

Options

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

Answer

D

Explanation

Due to continental drift, when Soiuth America joined North America, South American animals were overridden by North American fauna.
Due to the same continental dirt pouched mammals of Australia survived because of lack of competition from any other mammal.