class 12

Math

3D Geometry

Three Dimensional Geometry

Two circle of equal radii are intersect at $(0,1)and(0,1)$, and the tangent at $(0,1)$ to one of those passes through the centre of other. Then the distance between the centres is equal to (A) $2c$ (B) $2 $ (C) $2 1 $ (D) $21 $