The inductance of a closed-packed coil of 400 turns is 8 mH. A current of 5 mA is passed through it. The magnetic flux through each turn of the coil is:

A. 1/(4πμ₀) Wb
B. 1/(2πμ₀) Wb
C. 1/(3πμ₀) Wb
D. 0.4μ₀ Wb