The bond dissociation energy of $B-F$ in $BF_3$ is $646 \ kJ \ mol^{-1}$ whereas that of $C-F$ in $CF_4$ is $515 \ kJ \ mol^{-1}.$ The correct reason for higher $B-F$ bond dissociation energy as compared to that of $C-F$ is

• A
  stronger $\sigma$ bond between $B$ and $F$ in $BF_3$ as compared to that between $C$ and $F$ in $CF_4.$
• B
  significant $p\pi - p\pi$ interaction between $B$ and $F$ in $BF_3$ whereas there is no possibility of such interaction between $C$ and $F$ in $CF_4.$
• C
  lower degree of $p\pi - p\pi$ interaction between $B$ and $F$ in $BF_3$ than that between $C$ and $F$ in $CF_4.$
• D
  smaller size of $B$ atom as compared to that of $C$ atom.