The angular velocity of rotation of the earth in order to make the effective acceleration due to gravity equal to zero at equator should be

• A. \[\text{2}.\text{15 }\times \text{ 1}{{0}^{\text{3}}}\text{ rad}/\text{sec}\]
• B.        \[\text{2}.\text{25 }\times \text{ 1}{{0}^{-\text{3}}}\text{ rad}/\text{sec}\]
• C.  \[\text{1}.\text{25 }\times \text{ 1}{{0}^{\text{3}}}\text{ rad}/\text{sec}\]
• D.         \[\text{1}.\text{25 }\times \text{ 1}{{0}^{-\text{3}}}\text{ rad}/\text{sec}\]