Actually, I am looking for a solution of entity reference module, I don't know whether its possible or not. Please let me know if its possible.
Content Type : A Content Type : B
Content type B (a field) referencing Content Type A,
So, if I want to make a list of content of content type A, which is referencing in content type B, I can do it with views and entity relationship.
But I am looking for a solution where I want to make a list of content of Content type A, which is not referencing in content type B yet.
Is it possible, if yes then how?