A very long conducting wire is bent in a semi-circular shape from A to B as shown in the figure. The magnetic field at point P for steady current configuration is:

The straight segments passing through the line of P contribute zero magnetic field at P ($\theta =0$ or $180^{\circ }$).Only the semi-circular arc contributes: $B=\frac{{\mu }_{0}i}{4R}$.Using the right-hand thumb rule, if the current flows clockwise, the field points into the page.(Note: Based on the prompt's provided solution (c), there may be an additional straight segment at distance contributing $1/\pi$ or similar terms).