SQL

Consider the following two tables and four queries in SQL. Book (isbn, bname), Stock (isbn, copies)

Query 1:  SELECT B.isbn, S.copies
          FROM Book B INNER JOIN Stock S
          ON B.isbn = S.isbn;

Query 2:  SELECT B.isbn, S.copies
          FROM Book B LEFT OUTER JOIN Stock S
          ON B.isbn = S.isbn;

Query 3:  SELECT B.isbn, S.copies
          FROM Book B RIGHT OUTER JOIN Stock S
          ON B.isbn = S.isbn;

Query 4:  SELECT B.isbn, S.copies
          FROM Book B FULL OUTER JOIN Stock S
          ON B.isbn = S.isbn;

Which one of the queries above is certain to have an output that is a superset of the outputs of the other three queries?