Mole fraction $(X)$ of any solution is equal to

• A
  $ \frac{\text{No. of moles of solute}}{\text{Volume of solution in litre}} $
• B
  $ \frac{\text{No. of gram equivalent of solute}}{\text{Volume of solution in litre}} $
• C
  $ \frac{\text{No. of moles of solute}}{\text{Mass of solvent in kg}} $
• D
  $ \frac{\text{No. of moles of any constituent}}{\text{Total no. of moles of all constituents}} $