The co-ordinates of the point from where the tangents are drawn to the circle x2 + y2 = 1, x2 + y2 + 8x + 15 = 0 and x2 + y2 + 10y + 24 = 0 are of same length, are
1
\((2, \frac{5}{2})\)
2
\((-2, -\frac{5}{2})\)
3
\((-2, \frac{5}{2})\)
4
\((2, -\frac{5}{2})\)