Task: Class Relation Understanding (ontology: Sciences/Biology)

Which of the following classes is one valid superclass of '2nd arch mesenchyme from neural crest'?

A. 1st arch mesenchyme from neural crest
B. ADP metabolic process
C. mesenchyme from rhombencephalic neural crest
D. 17beta-hydroxy steroid

Answer: mesenchyme from rhombencephalic neural crest