The diagram shows the separation of crude oil into fractions.
What could X, Y and Z represent?
1 )
X: diesel / Y: lubricating oil / Z: paraffin
2 )
X: lubricating oil / Y: diesel / Z: paraffin
3 )
X: lubricating oil / Y: paraffin / Z: diesel
X: paraffin / Y: diesel / Z: lubricating oil
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