Blue green algae increase the fertility of soils. Reason: Blue green algae adds humus to the soil. *
Both assertion and reason are true and reason is the correct explanation of assertion.
b) Both assertion and reason are true but reason is not the correct explanation of assertion.
c) Assertion is true but reason is false.
d) Both assertion and reason are false.
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Answer:
option a) is the correct answer.
Explanation:
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