Which of the following compounds can be prepared by Sandmeyer's reaction?

(A) Chlorobenzene
(B) Bromobenzene
(C) Cyanobenzene
(D) Fluorobenzene

Choose the correct answer from the options given below:

(A), (B) and (C) only

The correct answer is Option (1) → (A), (B) and (C) only

Sandmeyer reaction converts aryl diazonium salts into aryl halides or nitriles using cuprous salts:

Fluorobenzene is not formed by Sandmeyer; it is obtained via Balz-Schiemann reaction.

Option-wise Explanation

(A) Chlorobenzene

Prepared by treating benzene diazonium chloride with $Cu_2Cl_2$. Classic Sandmeyer transformation.

(B) Bromobenzene

Obtained using $Cu_2Br_2$ with diazonium salt. Also a Sandmeyer reaction.

(C) Cyanobenzene

Formed with $Cu_2CN_2$. This is another Sandmeyer variant.

(D) Fluorobenzene – No.

Fluorobenzene is prepared by the Balz–Schiemann reaction, not Sandmeyer reaction.