नाइट्रोजन स्थिरीकरण में आवश्यक तत्व है : (A) \( \mathrm{Zn} \) (B) Mo (C) \( \mathrm{Cu} \) (D) B

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नाइट्रोजन स्थिरीकरण में आवश्यक तत्व है :
(A) \( \mathrm{Zn} \)
(B) Mo
(C) \( \mathrm{Cu} \)
(D) B
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