we can replace the value of X for each option and check the inequality
A.20
[tex]\begin{gathered} \sqrt[]{20}\le4 \\ 4.47\le4 \end{gathered}[/tex]the inequality is wrong because 4.47 is greater than 4
B.12
[tex]\begin{gathered} \sqrt[]{12}\le4 \\ 3.46\le4 \end{gathered}[/tex]The inequality is right because 3.46 is less than 4
C.2
[tex]\begin{gathered} \sqrt[]{2}\le4 \\ 1.41\le4 \end{gathered}[/tex]The inequality is right because 1.41 is less than 4
D.5
[tex]\begin{gathered} \sqrt[]{5}\le4 \\ 2.23\le4 \end{gathered}[/tex]inequality is right because 2.23 is less than 4
E. -1
[tex]\sqrt[]{-1}\le4[/tex]we can calculate the root of a negative number then the option is wrong