How would you extract the first $2$ rows and columns of ndarray x$?$

How would you extract the first $2$ rows and columns of ndarray x$?$

x$[1$:$2,1$:$2]$

x$[$:$2,$ :$2]$

x$[$:$-2,$ :$-2]$

x$[$:$3,$ :$3]$