Assertion :The immediate ancestor of present day humans was Australopithecus. Reason: The fossils of Australopithecus were discovered from Australia, and its cranial capacity was 1150 - 1300 cm $^{3}$ , which is very close to that of humans 1400 - 1450 cm $^{3}$ .

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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Both Assertion and Reason are incorrect.

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Solution

The correct option is D Both Assertion and Reason are incorrect.
Australopithecus are the first ape men that are found in the pliocene rocks of Tuang in Africa they had a brain capacity of 500cc that is more similar to ape brain that that of a human brain. And the immediate ancestor of present day humans is the cro-magnon man . Present day humans has a cranial caapcity of 1450cc.
Hence both the statements are wrong

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