For the system of linear equations : ...

For the system of linear equations :
x - 2y = 1, x - y + kz = -2, ky + 4z = 6, `k in R`, consider the following statements :
(A) The system has unique solution if `k ne 2, k ne - 2`.
(B) The system has unique solution if k = - 2.
(C) The system has unique solution if k = 2.
(D) The system has no-solution if k = 2.
(E) The system has infinite number of solutions if `k ne 2`.
Which of the following statements are correct?

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