Which element is present in all organic compounds?

• A. Sulfur
• B. $C$arbon
• C. $N$itrogen
• D. $O$xygen

Answer: (B)

Verified step by step guidance

1. Understand the definition of organic compounds: Organic compounds are primarily chemical compounds that contain carbon atoms bonded to hydrogen atoms, often along with other elements.
2. Recall that the key characteristic of organic chemistry is the study of carbon-containing compounds, which distinguishes them from inorganic compounds.
3. Recognize that while elements like sulfur (S), nitrogen (N), and oxygen (O) can be present in many organic molecules, they are not found in every organic compound.
4. Identify that carbon (C) is the element that is universally present in all organic compounds, as it forms the backbone of these molecules.
5. Conclude that the element present in all organic compounds is carbon, represented by the symbol \(\mathrm{C}\).