A current of 4 A is passed through a square loop of side 5 cm made of a uniform manganin wire as shown in the figure. The magnetic field at the centre of the loop is

• A

  $\frac{24 \sqrt{2}}{5} \times 10^{-5} \mathrm{~T}$
• B

  $\frac{3 \sqrt{2}}{5} \times 10^{-5} \mathrm{~T}$
• C

  $\frac{6 \sqrt{2}}{5} \times 10^{-5} \mathrm{~T}$
• Correct answer
  D

  Zero

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