Arrange the following in the asending order with respect to the percentage of carbon present.
$\begin{matrix} A & L i g n i t e B & A n t h r a c i t e C & P e a t D & B i t u m i n o u s \end{matrix}$

D > A > B > C

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B > D > A > C

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D > A > C > B

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B > D > A > C

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Solution

The correct option is D B > D > A > C
The time variation of the coalification process, as well as the depth at which the coal is found, affects the properties of coal.

$\begin{matrix} P r o p e r t y & P e a t & L i g n i t e & B i t u m i n o u s & A n t h r a c i t e M o i s t u r e & H i g h e s t & H i g h & R e l a t i v e l y l o w e r & L o w e s t H a r d n e s s & S o f t e s t & S o f t e r & S o f t & H a r d e s t U p o n b u r n i n g & S m o k e & S m o k e & S m o k e & S m o k e l e s s C a r b o n c o n t e n t & < 40 % & < 40 % & 40 - 90 % & > 90 % \end{matrix}$

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