Two bar magnets having same geometry with magnetic moments M and 2M, are firstly placed in such a way that their similer poles are same side then its time period of osccilation is $T_1$ . Now the polarity of one of the magnet is reversed then time period of osccilation is $T_2$ , then : -

Question

( A ) T1 = T2
( B ) $T_2$ =$\infty$
( C ) $T_1$ < $T_2$
( D ) $T_1$ > $T_2$