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M and N are mid-point of the diagnols AC...

M and N are mid-point of the diagnols AC and BD respectivley of quadrilateral ABCD, then`bar(AB) + bar(AD)+bar(CB)+bar(CD)`=

A

`overset"2bar(MN)`

B

`overset"2bar(NM)`

C

`overset"4bar(MN)`

D

`overset"4bar(NM)`

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The correct Answer is:
C
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