NEET 2022 Physics question

From Ampere's circuital law for a long straight wire of circular cross-section carrying a steady current, the variation of magnetic field in the inside and outside region of the wire is :

• (A)a linearly decreasing function of distance upto the boundary of the wire and then a linearly increasing one for the outside region.
• (B)uniform and remains constant for both the regions.
• (C)a linearly increasing function of distance upto the boundary of the wire and then linearly decreasing for the outside region.
• (D)a linearly increasing function of distance upto the boundary of the wire and then decreasing one with dependence for the outside region.Correct