What is the output of the below Java program?public static class Rstatic int num;public static void main $($String$(]$ args$)($new R $().$ dosomthing $()$ ;void dosomthing $()1$ munt$+$;$1($num $==0)$return;System. out.print $($num $+")$; dosomthing $()$ ;O A$.$ Compiler error.O B$.4568$O C$.4321$ D$.$ Runtime Error.