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Two sides of a rhombus are along the lines x-y+1=0 and 7x-y-5=0. If its diagonals intersect at (-1, -2), then which one of the following is a vertex of this rhombus?

A

`(1/3-8/3)`

B

`(-10/3,-7/3)`

C

`(-3,-9)`

D

`(-3,-8)`

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The correct Answer is:
A
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