Mass of a ring is non-uniformly distributed around its geometric centre. If R is radius of the ring, then
a) Centre of mass does not coincide with geometric centre
b) Position of centre of mass from the geometric centre will be x (0 < x < R)
c) Centre of mass will be nearer to the greater mass distribution
d) Centre of mass may lie out side the periphery
Centre of mass of a system lies near the region where more mass is accumulated.So statements (a) , (b) and (c) are right.