Question What element(s) MUST be present in a chemical compound to be considered organic hydrogen, only nitrogen and calcium carbon and hydrogen Od oxygen and helium

Answer 1

To be considered organic, a chemical compound must contain carbon and hydrogen as essential elements. Therefore, the correct answer from the options you've provided is "carbon and hydrogen." Organic compounds may also contain other elements such as oxygen, nitrogen, sulfur, and phosphorus, but the presence of carbon and hydrogen is fundamental to organic chemistry.