Q.Osmotic Pressure (π) of a solution is given by relation :

Osmotic pressure of a dilute solution follows a relation analogous to the ideal gas equation, using the amount of solute and the volume of solution. …

The question asks for the correct mathematical form of the osmotic-pressure relation (van't Hoff equation).

Osmotic pressure (π) is the colligative property equal to the excess pressure that must be applied to a solution to stop the net flow of solvent into it through a semipermeable membrane. For a dilute solution, van't Hoff showed that osmotic pressure obeys a relation of the same form as the ideal gas equation:

πV = nRT …