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A.


[quote="vipin7um"]In astronomy the term “red shiftâ€
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vipin7um
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OA is A.

Thanks,
Vipin
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Can anyone give the reasoning why B is not correct? or why "been" is necessary here?
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trivikram
Can anyone give the reasoning why B is not correct? or why "been" is necessary here?


B is wrong here because B implies that light has shifted by itself. But intended meaning is light has been shifted .... by the rapid motion of the galaxy



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