Understanding the reaction products.
- The Sandmeyer reaction replaces an aryl diazonium salt with a halogen, typically giving Ar-Br as the product. Hence, \( A - III \).
- The Finkelstein reaction is a halide exchange reaction, commonly yielding alkyl iodides (R-I). Hence, \( B - I \).
- The Swarts reaction involves fluorination, leading to the formation of alkyl fluorides (R-F). Hence, \( C - II \).