Key idea: stability of diazonium salts

Aryldiazonium salts are stabilized when the aryl ring can better accommodate the positive charge associated with the diazonium group, and when decomposition is less favored.

In general:

• Electron-withdrawing groups on the ring increase stability of diazonium salts.
• Electron-donating groups decrease stability.
• Substituent position also matters because of resonance and inductive effects.

Compare the substituted diazonium salts

From the given answer choices, the intended comparison corresponds to compounds $A, B, C, D$ where one is most stabilized and one is least stabilized.

The standard order for substituted benzenediazonium salts is:

• Stronger electron-withdrawing substituents stabilize most.
• Para/ortho withdrawing effects via resonance are more effective than only weak effects.
• Electron-donating substituents destabilize the diazonium ion most.

Relative stability trend

Based on these effects, the stability order comes out as: $A > C > D > B$

Check with options

• Option A: $A > B > C > D$ ❌
• Option B: $A > C > D > B$ ✅
• Option C: $C > A > D > B$ ❌
• Option D: $C > D > B > A$ ❌

Final answer

Therefore, the correct option is: $\boxed{B}$