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The following function reverse() is supposed to reverse a singly linked list. There is one line missing at the end of the function./* Link list node */struct node{    int data;    struct node* next;};  /* head_ref is a double pointer which points to head (or start) pointer   of linked list */static void reverse(struct node** head_ref){    struct node* prev   = NULL;    struct node* current = *head_ref;    struct node* next;    while (current != NULL)    {        next  = current->next;          current->next = prev;           prev = current;        current = next;    }    /*ADD A STATEMENT HERE*/}  What should be added in place of “/*ADD A STATEMENT HERE*/”, so that the function correctly reverses a linked list.*head_ref = prev;*head_ref = current;*head_ref = next;head_ref = NULL;

Question

The following function reverse() is supposed to reverse a singly linked list. There is one line missing at the end of the function./* Link list node /struct node{    int data;    struct node next;};  /* head_ref is a double pointer which points to head (or start) pointer   of linked list /static void reverse(struct node* head_ref){    struct node* prev   = NULL;    struct node* current = head_ref;    struct node next;    while (current != NULL)    {        next  = current->next;          current->next = prev;           prev = current;        current = next;    }    /ADD A STATEMENT HERE/}  What should be added in place of “/ADD A STATEMENT HERE/”, so that the function correctly reverses a linked list.*head_ref = prev;*head_ref = current;*head_ref = next;head_ref = NULL;

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Solution

*head_ref = prev;

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