Task: Class Relation Understanding (ontology: Food_Agriculture/PlantOntology)

Which of the following classes is one valid superclass of '2.04 main shoot and axillary shoots visible at four nodes stage'?

A. 1 main shoot growth stage
B. N second mitotic division stage in germinating pollen
C. abaxial nucellar projection
D. 2 formation of axillary shoot stage

Answer: 2 formation of axillary shoot stage