Which one of the following forms with an excess of `CN^(-)` (Cyanide) a complex having coordination number two

Options

A. (a) `Cu^(+)`
B. (b) `Ag^(+)`
C. (c) `Ni^(2+)`
D. (d) `Fe^(2+)`

Answer

B

Explanation

`Ag^(+)` has two coordination number forms complex with excess of `CN^(-)Ag(CN)_2`.