The magnetic field at a distance of 10 cm from a long straight thin wire carrying a current of 4 A is

• A

  $6 \mu \mathrm{~T}$
• B

  $16 \mu \mathrm{~T}$
• Correct answer
  C

  $8 \mu \mathrm{~T}$
• D

  $4 \mu \mathrm{~T}$

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