For the nitrogen-containing compounds given below, classify the functional group and write an appropriate IUPAC name.

• A. A: Secondary amine; 4-chloro-N,3-dimethylaniline
  B: Tertiary amine; 2-fluoro-N,N-dimethylpentan-1-amine
• B. A: Secondary amine; 4-chloro-N,5-dimethylaniline
  B: Tertiary amine; 2-fluoro-N,N-dimethylpentan-1-amine
• C. A: Secondary amine; 4-chloro-N,3-dimethylaniline
  B: Secondary amine; 2-fluoro-N,N-dimethylpentan-1-amine
• D. A: Secondary amine; 4-chloro-N,3-dimethylaniline
  B: Tertiary amine; 4-fluoro-N,N-dimethylpentan-5-amine

Answer: (A)