Step 1: Concept
Amino acids are classified based on the chemical nature of their side chains (R-groups).
Step 2: Meaning
Sulfur-containing amino acids possess a sulfur atom within their side chain structure.
Step 3: Analysis
Cysteine and Methionine are the primary sulfur-containing amino acids. Tyrosine is aromatic, Serine has a hydroxyl group, and Arginine is basic.
Step 4: Conclusion
Cysteine is the correct example from the provided options.
Final Answer: (B)