Q.

[[1]] is the highest quality hard coal.

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Detailed Solution

Anthracite is the highest quality hard coal. The most heavily metamorphosed type of coal is anthracite. It has 14% volatile matter and about 86% fixed carbon. After graphite, it has the fewest impurities and the highest calorific value. More than three-quarters of the world's anthracite is currently produced in China. Most of the anthracite mined in China is standard grade and used in electricity generation.
 
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