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

Which of the following definitions best describes 'B-cell receptor CD22 (human)'?

A. An endothelial transcription factor GATA-2 that is encoded in the genome of human.
B. A the concept molecule that is encoded in the genome of human.
C. A B-cell receptor the concept that is encoded in the genome of human.
D. A glutamyl aminopeptidase that is encoded in the genome of human.

Answer: A B-cell receptor the concept that is encoded in the genome of human.