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

Which of the following classes is one valid superclass of '(S)-6-acetamido-3-aminohexanoic acid zwitterion'?

A. ((18)O)water
B. 6-acetamido-3-aminohexanoic acid zwitterion
C. ( -)-1-hydroxybybetaochlamic acid
D. ( Z)-6-benzylidene-3-hydroxymethyl-1,4-dimethyl-3-methylsulfanylpiperazine-2,5-dione

Answer: 6-acetamido-3-aminohexanoic acid zwitterion