Which of the following is a valid way to initialize an array in Java?

A$)$ int$[]$ numbers $=1,2,3,4$;

B$)$ int$[]$ numbers $=$ new int $[4]\{1,2,3,4\}$;

C$)$ int numbers $[]=$ new int $[]\{1,2,3,4\}$;

D$)$ All are not valid

What will be the output of the following code?

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}[][]$ arr $=\{\{1,2,3\},\{4,5\},\{6,7,8,9\}\}$;

System.out.println$($arr$[1].$length$)$;

A$)2$

B$)3$

C$)4$

D$)5$

$23.$ What will be the output of the following code?

int $[]$ arr $=\{1,2,3,4,5\}$;

System.out.println$($arr$[$arr$.$length $-2])$;

A$)1$

B$)4$

C$)5$

D$)$ ArrayIndexOutOfBoundsException

$24.$ Which of the following will correctly iterate through all elements of a $2$D array? ${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}[][]$ arr $=\{\{1,2\},\{3,4\},\{5,6\}\}$

A$)$ for $($int $i=0$;$i$ arr.length; $i++$ for $($int $j++ln(arr[i][j])$;$i=0$;$ii++j=0$;$j$arr$[i]$;$j++$