A bar magnet of length ‘l’ and magnetic dipole moment ‘M’ is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be – <br>

Question

https://clay6.com/mpaimg/602_a.jpg

( A ) $\frac{M}{2} $
( B ) M
( C ) $\frac{3}{\pi} M$
( D ) $\frac{2}{\pi} M$