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

Answer 1

The correct answer is d) carbon and hydrogen.

For a compound to be considered organic, it typically must contain carbon (C) and hydrogen (H) in its molecular structure. While many organic compounds also contain other elements (such as oxygen, nitrogen, sulfur, and phosphorus), the presence of both carbon and hydrogen is essential for classification as an organic compound.