The magnetic needle of a tangent galvanometer is deflected at an angle $30^{\circ}$ due to a magnet. The horizontal component of the earth's magnetic field is $0.34 \times 10^{-4} \text{ T}$,which is along the plane of the coil. The magnetic field due to the magnet is:

• A
  $1.96 \times 10^{-4} \text{ T}$
• B
  $1.96 \times 10^{-5} \text{ T}$
• C
  $1.96 \times 10^{4} \text{ T}$
• D
  $1.96 \times 10^{5} \text{ T}$