Which of the following statement is incorrect ?

Question

$\begin {array} {1 1} (A)\;\text{Boron does not form ionic compounds with the formation of $B^{3+} $ ions} \\ (B)\;\text{Borane exhibits inert pair effect} \\ (C)\;\text{Aluminium carbide on reacting with water liberates methane} \\ (D)\;\text{Borone nitride on hydrolysis liberates $NH_3$} \end {array}$