Option 1 -> Uncouth means lacking refinement or manners - actually the opposite of genteel.
Option 2 -> Genial means friendly and cheerful - different from the refinement that genteel implies.
Option 3 -> Gentle means kind and mild-mannered - focuses on temperament rather than social refinement.
Option 4 -> Refined means cultured, elegant, and well-mannered - captures the essence of genteel.
Hence, Option 4: Refined -> Genteel describes someone who is polished, sophisticated, and possesses refined manners characteristic of upper social classes, making "refined" the perfect synonym -> correct