Correct Option (D)
- Statement 1: Furnace oil is a residual product obtained during the refining of crude oil. It is specifically derived from the distillation residues after lighter fractions have been separated, making it a direct product of oil refineries.
- Statement 2: Industries frequently employ furnace oil as a fuel for various purposes, including the generation of steam in boilers, which can then be used to produce electricity in captive power plants or industrial facilities.
- Statement 3: Furnace oil typically contains a significant percentage of sulphur. Its combustion releases sulphur dioxide (SO₂) into the atmosphere, which is a major air pollutant known to contribute to acid rain and respiratory issues.
Incorrect Options:
Options (1), (2), and (3) are incorrect because they only partially identify the correct statements. Since all three statements (1, 2, and 3) are factually accurate, option (4) is the comprehensive and correct choice.