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

Which of the following definitions best describes 'obsolete dihydroorotate oxidase activity'?

A. OBSOLETE. Catalysis of the reaction: (S)-dihydroorotate + O2 = H2O2 + orotate.
B. OBSOLETE. Any process that modulates the frequency, rate or extent of methionine-tRNA ligase activity.
C. OBSOLETE. Any process that activates or increases the frequency, rate or extent of histone H3-K27 acetylation.
D. OBSOLETE. Catalysis of the reaction: daidzein 7-O-beta-D-glucoside + H2O = daidzein + beta-D-glucose.

Answer: OBSOLETE. Catalysis of the reaction: (S)-dihydroorotate + O2 = H2O2 + orotate.