To normalize a 2NF to 3NF, in case a transitive dependency exists, then we remove those attributes that are transitively dependent from the relations. We do so by placing these attributes in a separate, new relation, and also placing the determinant’s copy along with it.
Note: If P -> Q and Q -> R are two functional dependencies, then P -> R is known as a transitive dependency. When normalizing a 2NF relation to 3NF, we remove these transitive dependencies.