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Equation of the tangent to the circle at...

Equation of the tangent to the circle at the point (1, -1) whose centre is the point of intersection of the straight lines x-y=1 and 2x+y-3=0, is

A

`x+ 4y +3 =0`

B

`3x -y -4=0`

C

`x -3y- 4=0`

D

` 4x +y -3=0`

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The correct Answer is:
A
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