A uniform magnetic field of 1000 G is established along the positive z-direction. A rectangular loop of sides 10 cm and 5 cm carries a current of 12 A. What is the torque on the loop as shown in the figure?
A. Zero
B. `1.8 xx 10^(-2)Nm`
C. `1.8 xx 10^(-3)Nm`
D. `1.8 xx 10^(-4)Nm`