A. Only I is true

B. Only II is true

C. both I and II are true

D. neither I nor II true

The locus of the middle point of chords of the ellipse x^{2}/a^{2}+y^{2}/b^{2}=1 which are at a constant distance d from the centre of the ellipse is

The locus of midpoint of the chord of the ellipse x^{2}/a^{2}+y^{2}/b^{2}=1 which pass through the fixed point (h, k) is

The equation of the auxiliary circle of x^{2}/12+y^{2}/18=1 is

If the chord of contact of the point (1, -2) with respect to the ellipse 4x^{2}+5y^{2}=20 is ax+by+c=0 then the ascending order of a, b, c is

The locus of a point P for which the chord of contact of x^{2}/a^{2}+y^{2}/b^{2}=1 touch the circle x^{2}+y^{2}=r^{2}