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Let ABCD be a parallelogram such that an...

Let ABCD be a parallelogram such that and `angleBAD` be an acute angle if `vecr` is the vector that coincides with the altitude directed from the vertex B to the side AD then `vecr` is given by

A

`vec r=3 vec q-(3(vecp.vecq))/((vecp.vecp))vecp`

B

`vec r= - vecq+((vecp.vecq))/((vecp.vecp))vecp`

C

`vec r= vecq-((vecp.vecq))/((vecp.vecp))vecp`

D

`vec r= -3vecq+(3(vecp.vecq))/((vecp.vecp))vecp`

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The correct Answer is:
B
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