A thin circular ring of mass M and radius r is rotating about its axis with an angular speed co. Two particles having mass m each are now attached at diametrically opposite points. The angular speed ω of the ring will become
(a) ωm/m+m
(b)ωm/m+2m
(c) ω m-2m)/m+2m
(d) ω(m+2m)/m.
