Biot-Savart Law & Circular Coils question from NEET 2022 (Phase 2)

Answer: (c)

1. Field of a long straight wire: $B = \frac{\mu_0 I}{2\pi r}$, same at every point at distance $r$, directed tangentially (right-hand thumb rule).
2. So the field lines are concentric circles in planes perpendicular to the wire.
3. So the answer is (c) circular.