$\begin {array} {1 1} (A)\;\text{$LiAlH_4$ and $LiGAH_4$ are reducing agents in inorganic chemistry} \\ (B)\;\text{$BF_3$ is a useful catalyst in Friedel - crafts reactions} \\ (C)\;\text{$LiAlH_4$ is used as a reducing agent in organic chemistry for selectivity reducing the functional groups} \\ (D)\;\text{The fluorides of $Al$ and $GA $ are covalent in character} \end {array}$
