2000017202

Which of the given matrices $K$, $L$, $M$, and $N$ have the same main diagonal? $$K=\left(\begin{array}{ccc}1& 7& 8\\ 4& 2& 9\\ 5& 6& 3\end{array}\right),L=\left(\begin{array}{ccc}3& 9& 8\\ 4& 2& 7\\ 5& 6& 1\end{array}\right),$$ $$M=\left(\begin{array}{ccc}1& 7& 9\\ 5& 2& 8\\ 4& 6& 3\end{array}\right),N=\left(\begin{array}{ccc}2& 7& 8\\ 4& 2& 6\\ 5& 7& 5\end{array}\right)$$