Three carbon-containing fuels are listed below.
1. coal
2. natural gas
3. petroleum
Which of these fuels are classified as ‘fossil fuels’ and which are fractionally distilled?
1 )
fossil fuels: 1, 2 and 3 / fractionally distilled: 1 and 3 only
fossil fuels: 1, 2 and 3 / fractionally distilled: 3 only
3 )
fossil fuels: 1 and 3 only / fractionally distilled: 1 and 3 only
4 )
fossil fuels: 1 and 3 only / fractionally distilled: 3 only
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