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Identify the following organism which is a symbiotic nitrogen fixer?

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Remember the important nitrogen-fixing bacteria: \[ \boxed{ \begin{aligned} \textit{Rhizobium} &\rightarrow \text{Symbiotic} \textit{Azotobacter} &\rightarrow \text{Free-living aerobic} \textit{Clostridium} &\rightarrow \text{Free-living anaerobic} \end{aligned} } \]

Updated On: Jul 14, 2026

Azotobacter
Rhizobium
Clostridium
Nitrosomonas

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The Correct Option is B

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List - I		List – II
A.	Streptococcus	i.	Citric acid
B.	Trichoderma polysporum	ii.	Clot buster
C.	Monascus purpureus	iii.	Cyclosporin A
D.	Aspergillus niger	iv.	Statins

Identify the following organism which is a symbiotic nitrogen fixer?

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The Correct Option is B

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