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Choose the correct alternative : Life ...

Choose the correct alternative :
Life span of our sun from birth till it becomes red giant is of …………

A

4.5 x 10^9 to 5 x 10^9 years

B

8.5 x 10^9 to 9.5 x 10^9 years

C

4.5 billion years

D

4.5 million years

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The correct Answer is:
A
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