Consider the following statements:
Statement I: Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions.
Statement II: Silica-bearing clay is mixed with limestone while manufacturing cement.
Statement III: Limestone is converted into lime during clinker production for cement manufacturing.
Which one of the following is correct in respect of the above statements?

Correct Option: Both Statement II and Statement III are correct but only one of them explains Statement I

Both Statement II and Statement III are correct, but only one explains Statement I. Statement I is correct as cement production contributes over 5% of global CO2 emissions. Statement II is correct because silica-bearing clay is mixed with limestone as raw material. Statement III is correct because during clinker production, limestone (calcium carbonate) undergoes calcination, converting into lime and releasing CO2. However, the direct cause of the massive CO2 emissions in Statement I is the chemical conversion in Statement III, making it the sole explanatory statement.