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Assertion a : Azolla is used as bioferti...

Assertion a : Azolla is used as biofertilzer in rice fields
Reason r: Azolla contains nitrogen fixing cyanobacteria in its root nodules

A

Both a and r true, but r is not correct explanation of a

B

a is true but r is false

C

a is false but r is true

D

Both a and r are true and r is correct explanation of a

Text Solution

Verified by Experts

The correct Answer is:
B
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