Identify the pollutant gases largely responsible for the discoloured and lustreless nature of marble of the Taj Mahal.
O3 and CO2
CO2 and NO2
SO2 and NO2
SO2 and O3
Option 1)
O3 and CO2
Option 2)
CO2 and NO2
Option 3)
SO2 and NO2
Option 4)
SO2 and O3
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