The chemical formula of the compound containing carbon and oxygen is: A. CO B. CO2 C. CO3 D. Both A and B

To solve this question, let's examine the options and understand the chemical formulas:

1. CO (Carbon monoxide):
This is the formula for carbon monoxide, where one carbon atom is bonded to one oxygen atom. It's a compound of carbon and oxygen.
2. CO₂ (Carbon dioxide):
This is the formula for carbon dioxide, where one carbon atom is bonded to two oxygen atoms. It’s another compound of carbon and oxygen.
3. CO₃ (Carbon trioxide):
This formula represents carbon trioxide, but it’s not a common or stable form in standard chemical compounds. It is usually found in the form of polyatomic ions such as carbonate (CO₃²⁻).
4. Both A and B:
Both "CO" (carbon monoxide) and "CO₂" (carbon dioxide) are valid chemical compounds containing carbon and oxygen.
Conclusion:
The correct answer is D. Both A and B, since both CO (carbon monoxide) and CO₂ (carbon dioxide) are legitimate compounds of carbon and oxygen.