The speed of light\[(c)\], gravitational constant \[(G)\] and Planck's constant \[(h)\] are taken as the fundamental units in a system. The dimension of time in this new system should be [AMU 1995]

• A.             \[{{G}^{1/2}}{{h}^{1/2}}{{c}^{-5/2}}\]
• B.                      \[{{G}^{-1/2}}{{h}^{1/2}}{{c}^{1/2}}\]
• C.             \[{{G}^{1/2}}{{h}^{1/2}}{{c}^{-3/2}}\]
• D.                      \[{{G}^{1/2}}{{h}^{1/2}}{{c}^{1/2}}\]