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

Which of the following classes is one valid superclass of 'ear spikelet pair meristem'?

A. ear inflorescence axillary meristem
B. B enlarged microsporocyte stage
C. 2.02 main shoot and axillary shoots visible at two nodes stage
D. BO.03 late boot stage

Answer: ear inflorescence axillary meristem