With reference to furnace oil, consider the following statements : 1. It is a product of oil refineries. 2. Some industries use it to generate power. 3. Its use causes sulphur emissions into environment. Which of the statements given above are correct?

Furnace oil is a residual product of oil refineries (Statement 1) used extensively by industries like cement and steel for heating and power generation (Statement 2), and its high sulphur content leads to significant environmental emissions (Statement 3). Option (c) is the most tempting wrong choice for candidates who might incorrectly assume that industries have entirely transitioned to cleaner fuels for power generation, overlooking furnace oil's continued use in boilers and DG sets. The core concept tested is the properties, industrial applications, and environmental footprint of heavy petroleum-based fuels.