A bar magnet of magnetic moment `M_1` is axially cut into two equal parts. If these two pieces are arranged perpendicular to each other, the resultant magnetic moment is `M_2`, then the value of `M_1'/'M_2` is
Options:
(a) `1/2sqrt2`
(b) `1`
(c) `1/sqrt2`
(d) `sqrt2`