The magnetic field of a planet at any location is approximately 0.5 G. Estimate its dipole moment if its position from the centre is $25.6 \times 10^6 M$. Assume the planet to be of spherical shape:

$11.3 \times 10^{20} Am^2$ $8.39 \times 10^{20} Am^2$ $8.39 \times 10^{24} Am^2$ $36.2 \times 10^{24} Am^2$

$8.39 \times 10^{24} Am^2$

The correct answer is Option (3) → $8.39 \times 10^{24} Am^2$