What are the major groups of organic compounds studying biology

Proteins, among the most complex of all organic compounds, are composed ofamino acids , which contain carbon, hydrogen, oxygen, and nitrogen atoms. Certain amino acids also have sulfur atoms, phosphorus, or other trace elements such as iron or copper.

umm... last time i checked the first battery was made of zinc and copper and when you look it up thats what it says Alessandro Volta (the inventor of batteries) made them out of so uhh... idk but i would pick b srry:(