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

Which of the following definitions best describes 'mitral valve'?

A. An atrioventricular valve that is part of the outflow part of the left atrium.
B. An atrioventricular valve that is part of the outflow part of the right atrium.
C. A bone that is part of a facial skeleton [Automatically generated definition].
D. Any migratory neural crest cell that is part of a cardiac neural crest.

Answer: An atrioventricular valve that is part of the outflow part of the left atrium.