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

Which of the following classes is one valid superclass of 'embryo shoot apical meristem'?

A. portion of embryo plant tissue
B. N second mitotic division stage in germinating pollen
C. 1 main shoot growth stage
D. 2 formation of axillary shoot stage

Answer: portion of embryo plant tissue