$\mathrm{A}, \mathrm{B}_1, \mathrm{~B}_2, \mathrm{~B}_3$ are the events in a random experiment. If $\mathrm{P}\left(\mathrm{B}_1\right)=0.25, \mathrm{P}\left(\mathrm{B}_2\right)=0.30$, $\mathrm{P}\left(\mathrm{B}_3\right)=0.45, \mathrm{P}\left(\frac{\mathrm{A}}{\mathrm{B}_1}\right)=0.05, \mathrm{P}\left(\frac{\mathrm{A}}{\mathrm{B}_2}\right)=0.04, \mathrm{P}\left(\frac{\mathrm{A}}{\mathrm{B}_3}\right)=0.03$, then $\mathrm{P}\left(\frac{\mathrm{B}_2}{\mathrm{~A}}\right)=$

• Correct answer
  A

  $\frac{6}{19}$
• B

  $\frac{8}{19}$
• C

  $\frac{12}{19}$
• D

  $\frac{5}{19}$

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