Which of the following orders of ionic radii is correct ?

Options

A. `H^(+)gtH^(-)gtH`
B. `Na^(+)gtF^(-)gtO^(2-)`
C. `F^(-)gtO^(2-)gtNa^(+)`
D. None of these

Answer

d

Explanation

On moving along the period ionic radii is decreases and on moving down the group ionic radii is increases.