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Two heavenly bodies s1 & s2 not far off ...

Two heavenly bodies `s_1 & s_2` not far off from each other, revolve in orbit

A

around their common centre of mass

B

`s_(1)` is fixed and `s_(2)` revolves around `s_(1)`

C

`s_(2)` is fixed and `s_(1)` revolves around `s_(2)`

D

cannot say

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The correct Answer is:
A
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