The correct relation between the elevation in boiling point and the molar mass of a solute is: ($W_1$ and $W_2$ are respectively weight of solvent $\&$ solute)

• A
  $M_2 = \frac{K_b \times W_2 \times 1000}{\Delta T_b \times W_1}$
• B
  $M_2 = \frac{K_b \times W_1 \times 1000}{\Delta T_b \times W_2}$
• C
  $M_2 = \frac{\Delta T_b \times K_b \times 1000}{W_1 \times W_2}$
• D
  $M_2 = \frac{\Delta T_b \times W_1 \times 1000}{K_b \times W_2}$