What happens when this Java code is compiled and run on a linked list with 6 elements 1, 2, 3, 4, 5, 6 (in that order)?

 class Node { int item; Node next; } static int foo (Node data) { if (data.next == null) { return data.item; } else { return foo (data.next); } } 

	Returns 1
	Returns 2
	Returns 5
	Returns 6
	Throws a NullPointerException