Super key:
A super key is a set of one or more attributes that can uniquely identify a record in a database table. It is a superset of a candidate key and may contain extra attributes. In other words, a super key is a combination of attributes that guarantees uniqueness in a table.

Candidate key:
A candidate key is a minimal super key, meaning it is a subset of a super key that can uniquely identify a record in a table. It does not contain any unnecessary attributes. There can be multiple candidate keys in a table, and one of them is chosen as the primary key.

Primary key:
A primary key is a candidate key chosen as the main identifier of a record in a table. It uniquely identifies each record in the table and has the following characteristics:
- It must contain unique values.
- It cannot have null values.
- There can be only one primary key per table.

Foreign key:
A foreign key is an attribute or a set of attributes in a table that refers to the primary key of another table. It establishes a relationship between two tables and ensures referential integrity. Foreign keys are used to maintain data integrity and enforce relationships between tables.

Explanation:
In the given question, the set of attributes that is being referred to is a super key. It is a combination of one or more attributes that can uniquely identify a record in a table. However, it may contain extra attributes that are not necessary for uniqueness. Therefore, the correct answer is option 'C' - super key.

A primary key is a candidate key chosen as the main identifier, and a foreign key is an attribute that refers to the primary key of another table. While these concepts are related to the concept of a super key, they are not the exact definition being described in the question.