A Queue Based on a Linked List Uses the Following

Multiple Choice

A queue based on a linked list uses the following code
Class Node{
String element;
Node next;
Node (String el,Node n) {
Element = el;
Next = n;
}
}
Node front,rear;
What is the right code for a constructor for such a linked list class?

A) element = el;next = n;
B) front = rear;
C) front = null;rear = null;
D) front = element;rear = front;