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ANSWER
The choice is correct.
EXPLANATION
The equation of a parabola in vertex form is given by:
where (h,k) is vertex of the parabola and 'a' is the leading coefficient of the parabola.
From the given options, the leading coefficient must be a=1.
We also have the vertex of the parabola at (1,2). This implies that h=1 and k=2.
We substitute these values into the formula to get,
The second option is correct.