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Which of the following coal contains alternative dull and laminated layers?

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in Engineering Chemistry II by (789k points)
Which of the following coal contains alternative dull and laminated layers?

(a) Cannel coals

(b) Banded coals

(c) Splint coals

(d) Bog-head coals

I got this question in an online interview.

This question is from Coal in section Fuels and Combustion of Engineering Chemistry II

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Right choice is (b) Banded coals

Easiest explanation: Banded coals are bituminous coals that are identified as vitrain, clarain, durain and fusain. Splint coals are black in colour which burns freely without swelling and cannel coals consist of a greasy lustre.

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