The deep colour produced when iodine dissolves in potassium iodide solution is due to the presence of

Options

A. `I^(+)`
B. `I^(-)`
C. `I_(3)^(-)`
D. `I_(2)^(-)`

Answer

C

Explanation

` I _ 2 + I^- to I _ 3 ^( - ) `
(from KI)