Assertion: Lime water gives a white precipitate when an excess of CO₂ is added to it.
Reason: Excess CO₂ reacts with lime water to produce calcium carbonate.
a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
b) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
c) Assertion is true, but Reason is false.
d) Both Assertion and Reason are false.