# 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 $CF_4$
( 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 ) 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 $CF_4$