The correct order of ionic radii `Y^(3+),La^(3+),Eu^(3+)` and `Lu^(3+)` is `(AT. No : Y = 39, La = 57, Eu = 63, Lu = 71)`

Options

A. `Y^(3+) lt La^(3+) lt Eu^(3+) lt Lu^(3+)`
B. `Lu^(3+) lt Eu^(3+) lt La^(3+) lt Y^(3+)`
C. `La^(3+) lt Eu^(3+) lt Lu^(+) lt Y^(3+)`
D. `Eu^(3+) lt La^(3+) lt Lu^(3+) lt Y^(3+)`

Answer

D

Explanation

`Eu^(3+) lt La^(3+) lt Lu^(3+) lt Y^(3+)`