A heavy brass sphere is hung from a light spring and is set in vertical small oscillation with a period T. The sphere is now immersed in a non 0-viscous liquid with a density 1/10th the density of the sphere. If the system is now set in vertical SHM, its period will be
(A) (9/10)T
(B) (9/10)2T
(C) (10/9)T
(D) T
