A $25 \;cm$ long solenoid has radius $2\; cm$ and $500$ total number of turns. It carries a current of $15\; A$. If it is equivalent to a magnet of the same size and magnetization $\overrightarrow{M}$ (magnetic moment/volume), then $|\overrightarrow{M}|$ is :

Question

( A ) $3000\; Am^{-1}$
( B ) $30000 \pi\; Am^{-1}$
( C ) $300\; Am^{-1}$
( D ) $3\; \pi\; Am^{-1}$