Answer: Co-planar
Explanation:
There are different types of relation between circles,
Congruent circles: Two circles are congruent to each other if they have same size( radius, diameter or circumference).
Concentric circles: If two circles have the same center,
Co planar : When the two circles lie on the same plane.
Tangent circle : Circles in a common plane that intersect in a single point.
In the given diagram, AC and BD are the radius of the circle having centers A and B respectively lying on the same plane, but neither they have same size nor they have same center, Also, they are not touching to each other that's why they are not congruent, concentric and tangent,
⇒ They are only co-planer circles.