Assertion (A) Chlorine is absorbed as Cl− ions. Its precise role is not well known. However with Na+ and K+, it help in determining solute concentration and anion-cation balance is cells. Reason (R) Chlorine plays an important role in photosynthesis and takes part in the water splitting reaction, thus releasing O2.

• A. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
• B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• C. If Assertion is true but Reason is false.
• D. If both Assertion and Reason and false.