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Question

The variety of coal having lowest carbon content is:

A
peat
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B
anthracite
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C
bituminous
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D
lignite
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Solution

The correct option is C peat
Peat is an organic sediment. Burial, compaction, and coalification will transform it into coal, a rock. It has a carbon content of less than 60% on a dry ash-free basis.
Peat forms when plant material does not fully decay in acidic and anaerobic conditions. It is composed mainly of wetland vegetation: principally bog plants including mosses, sedges, and shrubs. As it accumulates, the peat holds water.

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