$\sqrt{20}+\sqrt{18}$ is equivalent to

Question

$\begin{array}{1 1} (a)\;2\sqrt{5}+3 \sqrt{2} \\ (b)\;3\sqrt{5}+2 \sqrt{2} \\ (c)\;5\sqrt{2}+2 \sqrt{3}\\(d)\;2\sqrt{3}+5 \sqrt{2}\end{array}$