You can solve this using the formula $d^2=l^2+w^2+h^2$ and mover from here.

This is not a so hard question and it is quite useful to stretch your mental muscles and try to figure out alternative ways to solve it. As such, you can training yourself to see shortcuts or different ways to solve hardest questions ahead




If you draw a diagonal as in the figure, you will recognize that we do have an isosceles triangle in which two sides are equal and one not

In this specific triangle, we do have also the trifecta

$x:x:x \sqrt{3}$

because the two sides are = 10 the third is $x \sqrt{3}$

$10 \sqrt{3 }> 17$

A is the answer