Is this in Boyce-Codd NF? The dependencies are between key attributes

Question

Say we have the relation R={A,B,C} where:

A is a foreign key,
B is a foreign key,
C is a foreign key,
(A,B,C) is a primary key

With the dependencies:

• A->B,C
• B,C->A

Is this in Boyce-Codd NF? The dependencies are between key attributes, which confuses me.