A rectangular loop of dimensions `(axxb)` carries a current i. A uniform magnetic field `vec(B)=B_(0) hat(i)` exists in space. Then :
A. torque on the loop is `iabB_(0)sintheta`
B. torque on the loop is in negative y-direction
C. if allowed to move, the loop turn so as to increases `theta`
D. if allowed to move, the loop turn so as to decrease `theta`
