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Which element plays an important role in nitrogen -fixation

$\begin{array}{1 1}(A)\;\text{Mn}\\(B)\;\text{Mo}\\(C)\;\text{Zn}\\(D)\;\text{Cu}\end{array} $

1 Answer

Mo
Hence (B) is the correct answer.
answered Jul 16, 2014 by sreemathi.v
 
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