Cannel coal and boghead coal are the examples of _________________?
(A) Humic coals
(B) Liptobiolites
(C) Sapropelic coals
(D) None of these
Cannel coal and boghead coal are the examples of _________________?
(A) Humic coals
(B) Liptobiolites
(C) Sapropelic coals
(D) None of these
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