Plz solve this question with mechanism

Solution-

Explanation & Assumption-
  • NaNO2+HCl is a very important reagent that can be used for the generation of the diazonium salts and used for further reactions.
  • HBr gives the nucleophile (Bromide ions) hence, replace the diazonium salt with a bromine atom.
  • AgCl/H2O given the OH- nucleophile and this will be a more dominating nucleophile than Br-. Hence, it replaces that.
  • Here, no pyridine will be formed as a clear mechanism is also provided.

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