What are the use of front and rear pointers in CircularQueue

1. Rear pointer points to first element; front pointer points to the last element
2. Front pointer points to the first element; rear pointer points to null object
3. Front pointer points to first element; rear pointer points to the last element
4. Front and read pointers point to the first element
5. None of these

CircularQueue implementation is an abstract class where first and rear pointer point to the same object.