A. x2+y2=4

B. x2+y2+5x+4=0

C. x2+y2+5x-4=0

D. x2+y2-5x+4=0

The locus of the centre of the circles which touches externally the circle x^{2}+y^{2}-6x-6y+14=0 and also touches the y-axis is given byt the equation

The parametric equations of circle (x-3)^{2}+(y-2)^{2}=100 are

The point (-1, 0) lies on the circle x^{2}+y^{2}-4x+8y+k=0. The radius of the circle

The lengths of the chords of the circle x^{2}+y^{2}-2x-6y-15=0 which make an angle of 60^{0} at (1, 3) and the locus of the midpoints of all such chords are

The shortest distance from (-2, 14) to the circles x^{2}+y^{2}-6x-4y-12=0 is