The equation of normal of x^2+y^2-2x+4...

The equation of normal of
`x^2+y^2-2x+4y-5=0` at (2,1) is

A

(a) `y=3x-5`

B

(b) `2y=3x-4`

C

(c) `y=3x+4`

D

(d) `y=x+1`

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The correct Answer is:

A

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