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Question : [A]: Isolation is a mechanism which prevents interbreeding among other wise potential mates.[R]: It is the key factor without which all other factors of evolution will merge into jumble of no significance

Answer»

If both A and R are true and R is the CORRECT EXPLANATION of A
If both A and R are true but R is not the correct explanation of A
If A is true and R is FALSE
If both A and R are false

ANSWER :B


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