In which of the following `2^(nd)` anion is more stable than first ?

Options

A. `O_(2)N-overset(ɵ)(C)H_(2)` and `F-overset()(C)H_(2)`
B. `overset(ɵ)(C)F_(3)` and `overset(ɵ)C Cl_(3)`
C. `F_(3)C-overset(ɵ)(C)H_(2)` and `Cl_(3)C-overset(ɵ)(C)H_(2)`
D. `CH_(3)-overset(O)overset(||)(C)-overset(ɵ)(C)H_(2)` and `H_(2)N-overset(ɵ)(C)H_(2)`

Answer

B

Explanation

Due to `ppi -dpi` back bonding `C Cl_(3)^(-)` is more stable then `CF_(3)^(-)`