A set of operations is logical complete if every Boolean function can be implemented by using these operations. For example, $\{ANO,OR,$NOT$\}$ is logical complete, but $\{AND\}$ is not. Which of the following set of operations are logical complete? Select all right answers. Please note that $0$ and $1$ are constants and always available.

$\{xOR,OR\}$

$\{NOR\}$

$\{$AND$,$ OR$\}$

$\{xOR,$xNOR$\}$