In the reaction

the product E is




As we learnt ,
Reaction with Nitrous Acid Primary Amines -
Primary amines react with nitrous acid to produce diazonium ion.
- wherein
Sandmeyer Reaction -
N2 is replaced by Cl, Br or CN by using CuCl, CuBr or CuCN
- wherein

Option 1)

Option 2)

Option 3)

Option 4)

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