A) Calcium carbonate
Correct Answer: B
Solution :[b] The sulfuric acid (in acid rain) reacts with limestone (or marble) in a neutralization reaction. Limestone and marble buildings sometimes show blackened crusts that have peeled off to reveal crumbling stone beneath it. This black crust is called "gypsum". Gypsum is a mineral that forms from the reaction between calcite, water and sulphuric acid. Gypsum is soluble in water. It is usually washed away with time.
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