Which of the following is a correct Irving-Williams order? (Tendency of complex formation)

Options

A. `Mn^(1+) lt Fe^(2+) lt Co^(2+) lt Ni^(2+)`
B. `Ni^(2+) lt Co^(2+) lt Fe^(2+) lt Mn^(2+)`
C. `Fe^(2+) lt Mn^(2+) lt Ni^(2+) lt Co^(2+)`
D. `Co^(2+) lt Mn^(2+) lt Fe^(2+) lt Ni^(2+)`

Answer

A