For the system of linear equations : $$ x-2 y=I, x-y+k z=-2, k y+4 z=6, k \in R, $$ consider the following statements: (A) The system has unique solution if $k \neq 2, k \neq-2$. (B) The system has unique solution if $\mathrm{k}=-2$. (C) The system has unique solution if $\mathrm{k}=2$. (D) The system has no-solution if $\mathrm{k}=2$. (E) The system has infinite number of solutions if $k \neq-2$. Which of the following statements are correct?