A current I flows through a regular hexagonal loop of side length $l$. The magnitude of the magnetic field at the centre is

• A

  $\frac{\mu_0 I}{3 \pi l}$
• B

  $\frac{\mu_0 I}{2 \sqrt{3} \pi l}$
• Correct answer
  C

  $\frac{\sqrt{3} \mu_0 I}{\pi l}$
• D

  $\frac{3 \mu_0 I}{\pi l}$

Hence, the correct answer is option: 'C'.