A candidate key, which is not the primary key of a table, is a/an _________.a) Primary Key b) Foreign Key c) Candidate Key d) Alternate Key

To address the question about database keys, let's clarify the terminology involved:

1. Primary Key: A field or combination of fields that uniquely identifies a record in a table.
2. Foreign Key: A field in one table that is used to refer to the primary key in another table, establishing a relationship between the two tables.
3. Candidate Key: A set of fields that can uniquely identify a record in a table, which is a potential primary key.
4. Alternate Key: A candidate key that is not selected as the primary key.

Given the definition and options provided in the question, the correct answer is:

d) Alternate Key

This is because an alternate key is specifically defined as a candidate key that is not the primary key of a table.