| Consider the following organisms: |
| 1. Agariciis |
| 2. Nostoc |
| 3. Spirogyra |
| Which of the above is/are used as bio fertilizer /bio fertilizers? |
A) 1 and 2
B) 2 only
C) 2 and 3
D) 3 only
Correct Answer: B
Solution :
[b] Nostoc fix atmospheric nitrogen and are used as inoculations for paddy crop.
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