Six very long insulated copper wires are bound together to form a cable. The currents carried by the wires are $l_1=+10A,l_2=-13A,l_3=+10A,l_4=+7A,l_5=-12A$ and $l_6=+18A$ . The magnetic induction at a perpendicular distance of 10 cm from the cable is $\left({\mu }_0=4\pi \times \frac{{10}^{-7}Wb}{A}-m\right)$

• Correct answer
  A

  $40\mu T$
• B

  $37.5\mu T$
• C

  $30\mu T$
• D

  $35\mu T$

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