Which of the following reactions is used to prepare borazine?

The reaction of $H_{3}N_{3}B_{3}Cl_{3}$ $(A)$ with $LiBH_{4}$ in tetrahydrofuran gives inorganic benzene $(B)$. Further,the reaction of $(A)$ with $(C)$ leads to $H_{3}N_{3}B_{3}(Me)_{3}$. Then,compounds $(B)$ and $(C)$ respectively,are

Which of the following is added to borax to obtain boric acid?

Which of the following elements does not release $H_2$ gas upon reaction with an acid?

In diborane $(B_2H_6)$, the number of electrons that accounts for bonding in the bridges is

Which is the correct statement about Borax?