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Two vertices of a triangle ABC are B(5,-...

Two vertices of a triangle ABC are B(5,-1) and C(-2,3) .If the orthocentre of the triangle is the origin , find the thrid vertex.

A

`(7/2.(13)/2)`

B

`(3/2, (11)/2)`

C

(-4, -7)

D

none of these

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The correct Answer is:
C
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