Calculate the percentage dissociation of a $0.05 \ M$ solution of a weak electrolyte if its molar conductivity and molar conductivity at infinite dilution are respectively $3.3 \ \Omega^{-1} \ cm^2 \ mol^{-1}$ and $132 \ \Omega^{-1} \ cm^2 \ mol^{-1}$. (in $\%$)

• A
  $4.0$
• B
  $3.5$
• C
  $2.5$
• D
  $10.0$