Which of the following is a group of one or more attributes that uniquely identifies a row?

Answer: Option A

Key
- A key is a group of one or more attributes that uniquely identifies a row in a table.
Determinant
- A determinant is an attribute in a relation that determines the values of other attributes.
Tuple
- A tuple is a row in a table that contains a set of attributes.
Relation
- A relation is a table in a relational database that contains rows and columns.
Conclusion: The correct option is Key as it is the group of one or more attributes that uniquely identifies a row in a table.