The selection sort requires $\_\_\_\_\_\_\_\_\_$ comparisons for an array of n items.

Question $6$ options:

$\backslash ($ O$($n$)\backslash )$

$\backslash ($ O$($n log$\_2$ n$)\backslash )$

$\backslash ($ O$($n$^2)\backslash )$

$\backslash ($ O$(2$n$)\backslash )$