Assertion : Darwin's finches show a variety of beaks suited for eating large seeds,flying insects and cactus seeds.
Reason : Ancestral seed-eating stock of Darwin's finches radiated out from South American mainland to different geographical areas of the Galapagos Islands,where they found competitor-free new habitats.

• A
  If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
• B
  If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
• C
  If the Assertion is correct but Reason is incorrect.
• D
  If both the Assertion and Reason are incorrect.