Half-life of a radioactive disintegration (A \[\to \]B) having rate constant \[231\,{{\sec }^{-1}}\] is [CPMT 1988]

• A.                 \[3.0\times {{10}^{-2}}\] sec       
• B.                 \[3.0\times {{10}^{-3}}\] sec
• C.                 \[3.3\times {{10}^{-2}}\] sec       
• D.                 \[3.3\times {{10}^{-3}}\] sec