Two vessels separately contain two ideal gases $A$ and $B$ at the same temperature. The pressure of gas $A$ is three times the pressure of gas $B$. Under these conditions, the density of gas $A$ is found to be two times the density of $B$. The ratio of molecular weights of gas $A$ and $B$ i.e. $\frac{{\mathit{M}}_{\mathit{A}}}{{\mathit{M}}_{\mathit{B}}}$ is

• Correct answer
  A

  $\frac{2}{3}$
• B

  $\frac{3}{2}$
• C

  $\frac{3}{4}$
• D

  $\frac{4}{3}$

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