Explanation:

Here's an explanation for each statement:

- Statement I: Studies indicate that carbon dioxide emissions from the cement industry account for more than 5% of global carbon emissions.

- Correct. The cement industry is indeed a major source of global CO2 emissions.

- Statement II: Silica-bearing clay is mixed with limestone while manufacturing cement.

- Correct. Silica-bearing clay is used in the production of cement but is not directly related to CO2 emissions.

- Statement III: Limestone is converted into lime during clinker production for cement manufacturing.

- Correct. This conversion process releases CO2, which explains the emissions highlighted in Statement I.

- Option 1: Both Statement II and Statement III are correct and both of them explain Statement I

- Incorrect, as only Statement III directly explains the CO2 emissions.

- Option 2: Both Statement II and Statement III are correct but only one of them explains Statement I

- Correct Answer: Both are correct, but only Statement III explains the CO2 emissions aspect.

- Option 3: Only one of the Statements II and III is correct and that explains Statement I

- Incorrect because both statements are correct.

- Option 4: Neither Statement II nor Statement III is correct

- Incorrect, as both are factual.