A)
Element Absorbable form Nitrogen \[NO_{3}^{-},NO_{2}^{-},NH_{4}^{+}\]
B)
Element Absorbable form Sulphur \[{{S}^{2-}}\]
C)
Element Absorbable form Iron \[F{{e}^{3+}}\]
D)
Element Absorbable form Boron \[BO_{3}^{3-},{{B}_{4}}O_{7}^{2-}\]
Correct Answer: B
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