The reaction of \( \mathrm{H}_{3} \mathrm{~N}_{3} \mathrm{~B}_{3} \mathrm{Cl}_{3}(\mathrm{~A}) \) with \( \mathrm{LiBH}_…

The reaction of \( \mathrm{H}_{3} \mathrm{~N}_{3} \mathrm{~B}_{3} \mathrm{Cl}_{3}(\mathrm{~A}) \) with \( \mathrm{LiBH}_{4} \) in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to \( \mathrm{H}_{3} \mathrm{~N}_{3} \mathrm{~B}_{3}(\mathrm{Me})_{3} \). Compounds (B) and (C) respectively, are :

[JEE Main 2020, 9 Jan (Shift 2)]