What is the output after the execution of the following function on the following single linked list 1,6,7,4,9,8,3? struct Node { int data; Node*next; void do something (Node *head) { Node *p, *q; int temp; if (head==NULL ||head->next==NULL) return; p = head; q = head->next; while (9) { temp = p->data; p->data = q->data; q->data = temp; p = 9->next; q = p ? p->next : NULL; } Select one: a. 3,1,4,7,8,9,6 b. 1,6,4,7,8,3,9 C. 6,1,4,7,8,9,3 d. 6,1,4,4,8,9,9