Which of the following statements is NOT true regarding the electron donors in prokaryotic metabolism?

A) The use of organic compounds as electron donors is known as organotrophy.
B) Chemolithotrophy refers to the use of inorganic molecules as electron sources.
C) Photolysis of water provides electrons to phototrophic organisms such as cyanobacteria.
D) Electrons can be obtained from inorganic chemicals such as H2S.
E) Oxygen can serve as an electron donor.