$A$ rigid body of mass $m$ is rotating with angular velocity $\omega$ about an axis at a distance '$a$' from the center of mass $G$. The radius of gyration about an axis passing through $G$ is $K$. The rotational kinetic energy of this body about the new parallel axis will be:

• A
  $\frac{1}{2}mK^2\omega^2$
• B
  $\frac{1}{2}ma^2\omega^2$
• C
  $\frac{1}{2}m(a^2 + K^2)\omega^2$
• D
  $\frac{1}{2}m(a + K^2)\omega^2$