A) 1
B) 2
C) 3
D) 4
Correct Answer: D
Solution :
Highest oxidation state ® \[\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2\,\,\,\,\,\,\,\,\,\,\,\,\,+\,\,\,\,\,\,\,\,\,\,\,\,\,\,2\,\,\,\,\,\,\,\,\,\,\,=4\,\,\,}{\mathop{\text{no}\text{. of }s\text{-}{{e}^{-}}\,+\,\text{no}\text{. of }d\text{-}{{e}^{-}}}}\,\]
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