A semi circular current carrying wire having radius \( \mathrm{R} \...

A semi circular current carrying wire having radius \( \mathrm{R} \) is placed in \( \mathrm{x} \)-y plane with its centre at origin ' \( \mathrm{O} \) '. There is non-uniform magnetic field \( \overrightarrow{\mathrm{B}}=\frac{\mathrm{B}_{0} \mathrm{x}}{2 \mathrm{R}} \hat{\mathrm{k}} \) (here \( \mathrm{B}_{0} \) is +ve constant) is existing in the region. The magnetic force acting on semi circular wire will be along
(A) \( -\mathrm{x} \)-axis
(B) \( +y \)-axis
(C) \( -\mathrm{y} \)-axis
(D) \( +\mathrm{x} \)-axis