The correct order of ionic radii.

Options

A. `Al^(3+) lt Ga^(3+) lt In^(3+) lt Tl^(3+)`
B. `Ga^(3+) lt Al^(3+) lt In^(3+) lt Tl^(3+)`
C. `Al^(3+) lt In^(3+) lt Ga^(3+) lt Tl^(3+)`
D. `In^(3+) lt Al^(3+) lt Ga^(3+) lt Tl^(3+)`

Answer

A

Explanation

Down the group ionic radius increases