A uniform conducting wire of length 12a and resistance R is wound up as a current carrying coil in the shape of -

(i) an equilateral triangle of side a.
(ii) a square of side a.

The magnetic dipole moments of the coils in each case respectively are -
I is the current through the coils.

A. 4Ia² and 3Ia²
B. √3Ia² and 3Ia²
C. 3Ia² and Ia²
D. 3Ia² and 4Ia²