Assertion :Allopatric speciation according to Mayr results due to different variations because of mutations, genetic drift and postmating and permating reproductive isolation. Reason: These species are never geographically isolated.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
Allopatric speciation or geographic speciation is speciation that occurs when biological populations of the same species become isolated from each other to an extent that prevents or interferes with genetic interchange. This can be the result of population dispersal leading to emigration, or by geographical changes such as mountain formation, island formation, or large scale human activities. So, allopatric speciation according to Mayr results due to different variations because of mutations, genetic drift and postmating and permating reproductive isolation. So, assertion is correct. The species are geographically isolated. So, reason is wrong. Thus, option C is correct and other options are wrong.

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