Which of the following does not give a correct expression for K i ?

• A. Roult‚Äö√Ñ√∂‚àö√ë‚àö¬•s law
• B. Henry‚Äö√Ñ√∂‚àö√ë‚àö¬•s law
• C. Modified Roult‚Äö√Ñ√∂‚àö√ë‚àö¬•s law
• D. Gas law