MINUS operator is also called EXCEPT operator.

UNION returns unique rows.

Assertion. Cartesian product and joins are related.

Reason. Cartesian product is a join without any condition.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Assertion. The cardinality of a cartesian product can be predetermined, unlike joins.

Reason. The cardinality of a cartesian product is cardinality of table 1 x cardinality of table 2.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.