Which of the following is/are renewable source(s) of energy? 1. Fossil fuel 2. Biofuel 3. Uranium 4. Hydropower Select the correct answer using the code given below.
Options:
Accepted Answer: (D) 2 and 4
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 and 4” 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.