The osmotic pressure of a dilute solution is given by [MP PMT 1987]

• A.                 \[P={{P}_{o}}x\]                
• B.                 \[\pi V=nRT\]
• C.                 \[\Delta P={{P}_{o}}{{N}_{2}}\]    
• D.                 \[\frac{\Delta P}{{{P}_{o}}}=\frac{{{P}_{o}}-P}{{{P}_{o}}}\]