Given the following method to be considered within the SingleLinkedList class, what does this method do public boolean Undefined() { Node ptr = head; if (ptr == null || ptr.next == null) return false; E item1 = ptr.data; while (ptr.next != null) ptr = ptr.next; E item2 = ptr.data; if (item1.equals(item2)) return true; else return false; } a. It returns true if the first element in the list and the element before the last in the list are equal, otherwise, it returns false. O b. It returns true if the first element in the list and the last element in the list are equal, otherwise, it returns false. c. It returns true if the second element in the list and the last element in the list are equal, otherwise, it returns false. d. It returns true if the second element in the list and the element before the last are equal, otherwise, it returns false