Most active nitrogen fixing blue-green alga of rice fields is – McqOptions

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1.	Most active nitrogen fixing blue-green alga of rice fields is
A.	Anabaena azollae
B.	Aulosira fertilissima
C.	Cylindrospermum licheniforme
D.	Nostoc cycadacearum
Answer» C. Cylindrospermum licheniforme

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