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The equation of the pair of straight lines parallel tox-axis and touching the circle `x^2 + y^2 – 6x – 4y - 12 = 0,` is

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The equation of the pair of straight lines parallel tox-axis and touching the circle `x^2 + y^2 – 6x – 4y - 12 = 0,` is
A. `y^(2)-4y-21=0`
B. `y^(2)+4y-21=0`
C. `y^(2)-4y+21=0`
D. `y^(2)+4y+21=0`
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Correct Answer - A
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