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PPSC Past Papers Punjab Enforcement and Regulatory Authority, | By

What is the cause of stone cancer in the Taj Mahal’s marble?

A. Acid rain caused by air pollution
B. Growth of moss and algae
C. High humidity
D. Earthquakes
Correct Answer: A. Acid rain caused by air pollution
Explanation: Acid rain corrodes marble, causing the "stone cancer" effect.

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