Assertion: Mosses are of great ecological importance.
Reason : Mosses along with lichens are the first organisms to colonise rocks to form soil.

• A

  If both the assertion and the reason are true and the reason is a correct explanation of the assertion

• B

  If both the assertion and reason are true but the reason is not a correct explanation of the assertion

• C

  If the assertion is true but the reason is false

• D

  If both the assertion and reason are false