Data structures

Head Next Next Next Next NULL NULL Prev Prev Prev Prev A Doubly Linked List (DLL) contains an extra pointer, typically called previous pointer, together with next pointer and data which are there in singly linked list. Now. You have a list and a node like the ones depicted below. head is pointing the node containing 1 and tail is pointing the node containing 4 left after the following code runs: n->next-left->next; left->next-previous left->next -n n-previous =left; n; = what is the order of traversing the list from tail to head? Write each number separated by a single space. Select one: a. seg fault b. 54321 C. 5421 d. 5 3 21