[tex]L=\sqrt{2} \\
M=3\sqrt{3}\\
N=\sqrt{16}=4 \\
P=\sqrt{9}=3[/tex]
[tex]L+M=\sqrt{2}+3\sqrt{3} \\
not \ rational \\ \\
M+N=3\sqrt{3}+4 \\
not \ rational \\ \\
N+P=4+3=7 \\
rational \\ \\
P+L=3+\sqrt{2} \\
not \ rational[/tex]
The answer is (3) N + P.