10. 下列之反應為若是在酸中進行,則H2C2O4及H2O之係數各為? (A) H2C2O4 = 5, H2O = 8 (B) H2C2O4 = 1, H2O = 1 (C) H2C2O4 = 5, H2O = 1 (D) H2C2O4 = 1, H2O = 4 (E) H2C2O4 = 3, H2O = 2