Which element is present in all organic compounds?

• A. $C$
• B. $O$
• C. $H$
• D. $N$

Answer: (A)

Verified step by step guidance

1. Understand that organic compounds are primarily defined by the presence of carbon atoms in their structure.
2. Recall that carbon atoms form the backbone of organic molecules, bonding with hydrogen, oxygen, nitrogen, and other elements.
3. Recognize that while hydrogen, oxygen, and nitrogen are common in many organic compounds, they are not present in all of them.
4. Identify that carbon (C) is the only element that is universally present in every organic compound.
5. Conclude that the element present in all organic compounds is carbon, represented by the symbol \(C\).