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if the coordinates of the mid points of the Sides of a triangle are `(1,2) ,(0,-1)` and `(2, -1)`.Find the coordinates of its vertices `:

A

(1, -4),(3, 2),(-1,2)

B

(1, 2),(2, 3),(3, -4)

C

(3, 4),(5, 2),(1, 2)

D

none of these

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The correct Answer is:
A
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