Choose the correct answerWhich forms has a relation that possesses data about an individual entity:Options4NF3NF2NF5NF

The correct answer is 3NF. A relation is in third normal form (3NF) if it is in 2NF and no non-prime attribute is transitively dependent on the primary key. This form is used to reduce the duplication of data and ensure referential integrity by ensuring that the entity is in second normal form and all the attributes in a table are determined only by the candidate keys of that relation.

To determine which form has a relation that possesses data about an individual entity, we need to understand the different normal forms in database design.

1. 1NF (First Normal Form): This form ensures that each column in a table contains only atomic values, meaning that it cannot be further divided. It does not directly address the issue of data about individual entities.

2. 2NF (Second Normal Form): This form builds upon 1NF and requires that each non-key column in a table is functionally dependent on the entire primary key. While it helps in organizing data, it does not specifically focus on data about individual entities.

3. 3NF (Third Normal Form): This form further refines the design by eliminating transitive dependencies. It ensures that each non-key column is dependent only on the primary key and not on other non-key columns. Again, it does not directly address data about individual entities.

4. 4NF (Fourth Normal Form): This form deals with multi-valued dependencies and is not directly related to data about individual entities.

5. 5NF (Fifth Normal Form): This form, also known as Project-Join Normal Form (PJNF), addresses the issue of data about individual entities. It ensures that each non-key column in a table is dependent on the primary key and not on any other non-key columns or combinations of non-key columns.

Based on the options provided, the correct answer would be 5NF, as it specifically focuses on relations that possess data about individual entities.