Moment of inertia of a magnetic needle is 40 gm-cm2 has time period 3 seconds in earth's horizontal field = \[3.6\times {{10}^{-5}}\]weber/m2. Its magnetic moment will be

• A.            \[0.5\,A\times {{m}^{2}}\]
• B.            \[5\,A\times {{m}^{2}}\]
• C.            \[0.250\,A\times {{m}^{2}}\]
• D.            \[5\times {{10}^{2}}A\times {{m}^{2}}\]