1.

The radii of F, F^(-), O, O^(2-) are in the order

Answer»

`O^(2-) GT F^(-) gt O gt F`
`O^(2-) gt F^(-) gt F gt O`
`F^(-) O^(2-) gt F gt O`
`O^(2) gt O gt F^(-) gt F`

ANSWER :A


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