Organic compounds are those that contain which element?

• A. $C$
• B. $S$
• C. $N$
• D. $O$

Answer: (A)

Verified step by step guidance

1. Understand the definition of organic compounds: Organic chemistry primarily studies compounds that contain carbon atoms bonded to other elements.
2. Recognize that while elements like sulfur (S), nitrogen (N), and oxygen (O) are often found in organic molecules, the presence of carbon (C) is the defining feature of organic compounds.
3. Recall that carbon's unique ability to form four covalent bonds allows it to create a vast variety of complex molecules, which is why it is central to organic chemistry.
4. Therefore, identify carbon (C) as the essential element that must be present in any organic compound.
5. Conclude that the correct answer to the question is the element carbon (C).