QUESTION $10$

What should be the name of the file that has the following content:

public class X

$\{$

$\}$

class Y$\{$

public static void main$($String$[]$ args$)\{$

System.out.println$("$Hello$")$;

$\}$

$\}$

A$.$ X$.$java

B$.$ Y$.$java

C$.$ Error: A file can has only one class.

D$.$ X$.$class