Which of the following are biofuels?

1.Gasoline

2.Methanol

3.Methane

4.Ethanol

A1, 2 & 3 only

B2, 3 & 4 only

C2 & 4 only ✓ Correct

D1 & 4 only

Correct answer: (C) 2 & 4 only

Explanation

Methanol and ethanol are biofuels made by processing plant biomass.

Statement 1, gasoline, is a fossil fuel refined from petroleum, not a biofuel.

Statement 2, methanol, can be produced from wood and other biomass as a biofuel.

Statement 3, methane, is treated here as fossil natural gas rather than part of the biofuel set.

Statement 4, ethanol, is a leading biofuel fermented from crops, so the biofuels are methanol and ethanol.

Ethanol is widely blended with petrol to cut fossil fuel use.

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