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

Which of the following definitions best describes 'obsolete keto acid formate lyase activity'?

A. OBSOLETE. Catalysis of the reaction: L-asparagine + H+ + hydroxylamine = beta-L-aspartylhydroxamate + NH4.
B. OBSOLETE. Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: solute(out) + H+(in) = solute(in) + H+(out).
C. OBSOLETE. Catalysis of the reaction: 2-oxobutanoate + CoA = propionyl-CoA + formate.
D. OBSOLETE. (Was not defined before being made obsolete).

Answer: OBSOLETE. Catalysis of the reaction: 2-oxobutanoate + CoA = propionyl-CoA + formate.