The following question is based on the C code below:

fun$10\{$

if $($fork$()==0)\{$

printf$("$Aln$")$;

$\})$ else $\{$

printf$("$B$$n$")$;

if $($fork$()==0)\{$

printf$("$Cln$")$;

$\})$ else $\{$

printf$("$Dln$")$;

$\}$

fork$()$;

printf$("$Eln$")$;

$\}$

$\}$

How many times will fork$()$ be called when we execute the given code?

$0$

$1$

$2$

$3$

$4$

$5$