What is the output for the following code?

import java.util.$*$;

public class Test $\{$

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

Set set $=$ new HashSet$()$;

set.add$($new A$())$;

set.add$($new A$())$;

set.add$($new A$())$;

set.add$($new A$())$;

System.out.println$($set$)$;

$\}$

$\}$

class A $\{$

int r $=1$;

public String toString$()\{$

return r $+""$;

$\}$

public boolean equals$($Object o$)\{$

return this.r $==(($A$)$o$).$r;

$\}$

public int hashCode$()\{$

return r;

$\}$

$\}$

Group of answer choices

$[1,1,1]$

$[1,1,1,1]$

$[1]$

$[1,1]$