With reference to fossil fuels, consider 1 the following statements : 1. Coal is the most abundant fossil fuel and has high specific energy and energy density. 2. The action of heat and pressure changes plant matter in stages from anthracite to bituminous to lignite coal.… | UPSC CAPF 2026 Q No 103

Accepted Answer: (B) 2 only

Topic Covered: Chemistry and Energy

Key Concept: Chemical properties, fuels, petroleum and oxidation states

The correct choice follows from the standard scientific definition or process involved. “2 only” matches the relevant biological, ecological, chemical or energy concept, while the alternatives conflict with the core principle.

The key is to apply the central fact, formula, definition or relationship tested in the question and then eliminate alternatives that do not satisfy it.