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 coil in each case respectively are :

(1) √3Ia² and 3Ia²
(2) 3 Ia² and Ia²
(3) 3 Ia² and Ia²
(4) 4 Ia² and 3 Ia²