Which declares a doubly linked list?

public class Node

$\{$

public int info;

public Node Llink

public Node newNode;

$\}$

public class Node

$\{$

public int info;

public Node Llink;

public Node Rlink;

$\}$

public class LinkNode

$\{$

public int number;

public LinkNode next;

public LinkNode prev;

$\}$

Answers $2$ & $3$

Answers $1,2$ & $3$