Electromagnetic Induction and Alternating Currents: JEE Main 2022 Physics question

The electric current in a circular coil of 2 turns produces a magnetic induction B₁ at its centre. The coil is unwound and in rewound into a circular coil of 5 tuns and the same current produces a magnetic induction B₂ at its centre. The ratio of ${{{B_2}} \over {{B_1}}}$ is