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A square is inscribed in the circle `x^2+y^2-2x+4y+3=0` . Its sides are parallel to the coordinate axes. One vertex of the square is `(1+sqrt(2),-2)` (b) `(1-sqrt(2),-2)` `(1,-2+sqrt(2))` (d) none of these

A

a)`(1+sqrt2,-2)`

B

b)`(1-sqrt2,-2)`

C

c)`(1,-2+sqrt2)`

D

d)none of these

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