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

Which of the following definitions best describes 'quercetin-3-O-alpha-D-arabinofuranoside'?

A. A quercetin O-glycoside that is quercetin attached to a alpha-D-arabinofuranosyl residue at position 3 via a glycosidic linkage.
B. A triterpenoid saponin that is cucurbita-1,5-diene substituted by hydroxy groups at positions 16, 20 and 25, a methoxy group at position 24, oxo groups at positions 3, 11 and 22 and a beta-D-glucopyranosyloxy residue at position 2. It has been isolated from the roots of Machilus yaoshansis.
C. A glycosyloxyflavone that is luteolin substituted by a methoxy group at position 6 and an alpha-L-rhamnosyl moiety at position 7 via a glycosidic linkage.
D. A twelve-membered macrolide antibiotic that is biosynthesised by Streptomyces venezuelae.

Answer: A quercetin O-glycoside that is quercetin attached to a alpha-D-arabinofuranosyl residue at position 3 via a glycosidic linkage.