Arrange the following in the increasing order of their degree of Coalification ?

1.Bituminous

2.Anthracite

3.Sub-bituminous

4.Peat

5.Lignite

A4, 5, 3, 1, 2 ✓ Correct

B4, 3, 1, 2, 5

C4, 5, 1, 3, 2

D5, 4, 1, 3, 2

Correct answer: (A) 4, 5, 3, 1, 2

Explanation

Coalification is the gradual transformation of plant matter into harder, carbon-richer coal, increasing from peat to anthracite.

Peat is the earliest, softest stage with the lowest carbon content.

Lignite, or brown coal, comes next with slightly more carbon than peat.

Sub-bituminous coal follows, higher in carbon and energy than lignite.

Bituminous coal is more mature and widely used for power and steel.

Anthracite is the hardest, highest-carbon coal at the top of the coalification sequence.

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