Vapour pressure of a solution of $5\mathrm{g}$ of non- electrolyte in $\text{100}\mathrm{g}$ of water at a particular temperature is $\text{2985}\mathrm{N}/{\mathrm{m}}^2$ . The vapour pressure of pure water is $\text{3000}\mathrm{N}/{\mathrm{m}}^2$ . The molecular weight of the solute is

• A

  60
• B

  120
• Correct answer
  C

  180
• D

  380

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