The concentration of hydrogen ion in a sample solution is $4.7 \times 10^{-4} \mathrm{M}$. Find its $\mathrm{pH}$.

• A

  $2.32$
• Correct answer
  B

  $3.33$
• C

  $4.70$
• D

  $0.047$

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