which of these is a compound?\no\nco₂\no₂\nco

which of these is a compound?\no\nco₂\no₂\nco
Answer
Brief Explanations:
A compound is a substance made up of two or more different elements chemically combined. O is an oxygen atom, O₂ is an oxygen molecule (a di - atomic element), Co is the element cobalt. CO₂ is carbon dioxide, which is composed of one carbon atom and two oxygen atoms chemically bonded together.
Answer:
CO₂