Question

Which of the following helps in coal formation [AFMC 2000]
A) Bacteria
B) Gymnosperm
C) Pteridophytes
D) Archaebacteria

Answer 1

sphagnam a moss of pteridophytes

Answer 2

Pteridophytes helps in coal formation.  

Explanation:

The coal is formed when the giant plants or ferns were thrown in swamp forest and the dead plant made layers of the dead plants at the bottom part of the swamp.

Then during the course of time heat and pressure made chemical and physical changes to push out the oxygen from the dead plants to form coal like structure. When more plants died and fall on the layer then the thickness of the layer increased.