GKFix MCQ Question

What is the main reason for using dry acetone in the Finkelstein reaction (R-X + NaI → R-I + NaX)?

• A. To dissolve the alkyl halide reactant better
• B. To precipitate the by-product NaCl or NaBr, driving the reaction forward
• C. To activate the alkyl halide
• D. To prevent the formation of HI