Task: Property Constraint Reasoning (ontology: Sciences/Biology)

The property 'orthogonal to' applies to instances of 'anatomical axis', and 'sagittal plane' is a subclass of 'anatomical axis'. Which class can appear as the value of 'orthogonal to' for instances of 'sagittal plane'?

A. anatomical plane
B. cell division
C. sexually immature stage
D. immunogen

Answer: anatomical plane