A : Taj Mahal is being destroyed by `SO_(2)` coming from Mathura refinary.
R : This converts `CaCO_(3)` into unstable calcium sulphate.
A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are ture but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3).
D. If both Assertion and Reason are false statements, then mark (4).
