What is printed out with the following code if it run from a command line and there are no errors?

main$()$

int fd $=$ open$("$file$.$txt$",$ O$\_$RDONLY$)$;

fd $=$ open$("$file$2.$txt$",$ O$\_$RDONLY$)$;

int loc $=$ lseek$($fd$,0$x$100,1)$;

cout $<<$ fd $<<$ endl;

$\}$

Group of answer choices

$1$

$3$

$4$

$100$

$5$

$256$