GKFix MCQ Question

What is the primary role of sodium nitrite (NaNO2) in the Sandmeyer reaction sequence?

• A. To reduce the copper(II) salt formed back to copper(I)
• B. To act as a base and neutralize the acid
• C. To form nitrous acid, which reacts with the primary amine to generate the diazonium salt
• D. To directly react with the copper halide