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Subject :NSO    Class : Class 8

Fill in the blanks left in the classification of the fossil fuels.

p q u v w x
A Petroleum Coal Petroleum gas Bitumen Coal gas Coke
B Coal Petroleum Coal gas Coke Petroleum gas Bitumen
C Coal Petroleum gas Coal Charcoal Gasoline Coal tar
D Petroleum Coal Gasoline Bitumen Natural gas Coke

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