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Four successive members of the first row...

Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest `E_(M^(3+)|M^(2+))^(@)` value ?

A

Co (Z =27)

B

Cr (Z = 24)

C

Mn (Z = 25)

D

Fe (Z = 26)

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