Centroid of circle lies at

Explanation:

For a circle, the centroid lies at the centre.

Centroid:

• The point that may be considered as the center of a one– or two–dimensional figure i.e. the sum of the displacements of all points in the figure from such a point being zero.
• The centroid of a circle lies at the center of a circle that is also called as the radius of the circle from edges of a circle. Therefore option 3 is correct.