What is the output of the following code:

int main$()$

$\{$

int $x=5$;

if $($fork $()==0)$

else

$x++$;

$x-$cdots;

printf$("\%$d$\backslash$t$",x$;$//$print value of $x$

return $$;

$\}$

Select one:

a$.4$

b$.5$

c$.6$

d$.64$ or $46$