1.

What will be the equation of the circle which touches the line x + 2y + 5 = 0 and passes through the point of intersection of the circle x2 + y2 = 1 and x2 + y2 + 2x + 4y + 1 = 0?

A. x<sup>2</sup> + y<sup>2</sup> + 2x + y = 0
B. x<sup>2</sup> + y<sup>2</sup> + x + 2y = 1
C. x<sup>2</sup> + y<sup>2</sup> + x + 2y = 0
D. x<sup>2</sup> + y<sup>2</sup> + 2x + 2y = 1
Answer» D. x<sup>2</sup> + y<sup>2</sup> + 2x + 2y = 1


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