📝 Multiple Choice Question
General-science
What is the most common factor for the yellowing of the Taj Mahal gradually over the years?
A
Carbon monoxide present in air
B
Marble turns yellow with time
C
Marble reacts with nitrogen in air
D
Acid rain
Explanation
Industrial pollutants like sulfur dioxide react with atmospheric moisture to form acid rain, which chemically attacks and discolors the calcium carbonate marble of the Taj Mahal.
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