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In parallelogram ABCD, if overline(AB)=o...

In parallelogram ABCD, if `overline(AB)=overline(a) and overline(AD)=overline(b)`, then the diagonals interm of `overline(a) and overline(b)` are

A

`overline(a)+overline(b), overline(a)-overline(b)`

B

`overline(a), overline(b)`

C

`overline(a)+overline(b), overline(b)-overline(a)`

D

`2overline(a), 2overline(b)`

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The correct Answer is:
C
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