A 10 cm long wire lies along y-axis. It carries a current of 1.0 A in positive y-direction. A magnetic field $\vec{B} = (5 \text{ mT}) \hat{j} - (8 \text{ mT}) \hat{k}$ exists in the region. The force on the wire is : (A) $(0.8 \text{ mN}) \hat{i}$ (B) $-(0.8 \text{ mN}) \hat{i}$ (C) $(80 \text{ mN}) \hat{i}$ (D) $-(80 \text{ mN}) \hat{i}$