Magnetic Effects of Current and Magnetism: JEE Main 2021 Physics question

A solenoid of 1000 turns per metre has a core with relative permeability 500. Insulated windings of the solenoid carry an electric current of 5A. The magnetic flux density produced by the solenoid is : (permeability of free space = 4$\pi$ $\times$ 10^$-$7 H/m)