data sturucture

Question 13 3 Point Assume the following method is within the Singlelinked List class, what does it do? public void Undefined item. E item2) Node ptr-head: while (ptr lanul { iftptr.data.equals(item1)) { head = new Node(item2, head): return; ptraptr.next 3 A Adds a node before the first node with its data as item2, if item1 exists as data of the first node in the list. B Adds a node before the first node with its data as item2, if itemt exists anywhere in the list. Adds a node after the last node with its data as item2, if item1 exists anywhere in the list. Adds a node after the last node with its data as item2, if item1 exists as data of the first node in the list