Which of the following statements are true? Select all that apply.

#include

#include

#include

int main$($int argc, char $*$argv$[])$

$\{$

printf$("$PID of exp.c$=\%$d

$",$ getpid$())$;

char $*$args$[]=\{"$Hello$","$C$",$ "Programming", NULL$\}$;

execv$("./$hello$",$ args$)$;

printf$("$Back to exp.c$")$;

return $0$;

$\}$

$1$ point

getpid$()$ gives pid of the calling process.

The code introduces an error.

This code will print Hello C Programming.

execv$()$ will execute the hello file.