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Let ABCD be a parallelogram whose diagon...

Let ABCD be a parallelogram whose diagonals intersect at P and let O be the origin. What is `vec(OA) + vec(OB) + vec(OC ) + vec(OD)` equal to

A

`4vec(OP)`

B

`2vec(OP)`

C

`vec(OP)`

D

Null vector

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The correct Answer is:
A
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