The magnetic field of earth at the equator is approximately $$4 \times 10^{-5}$$ T. The radius of earth is $$6.4 \times 10^6$$ m. Then the dipole moment of the earth will be nearly of the order of:

A

$$10^{20}$$ A m$$^2$$

B

$$10^{16}$$ A m$$^2$$

C

$$10^{10}$$ A m$$^2$$

D

$$10^{23}$$ A m$$^2$$