Which of the following is an example of a circular self-referential structure?

Question

Answer

struct Node { 
     int data; 
     struct Node *next; 
 }; 
 int main() { 
     struct Node a, b; 
     a.next = &b; 
     b.next = &a; 
 }

Answer

struct Node { 
     int data; 
     struct Node next; 
 };

Answer

struct Node { 
     int data; 
 };

Answer

struct Node { 
     int data; 
     struct Node *next; 
 };

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