Predict the product:





As we discussed in concept
Reaction of tertiary arylamines with HNO2 -
tertiary arylamines react with nitrous acid to form P - nitroso aromatic compounds.
- wherein

and
Reaction of secondary amine with HNO2 -
Secondary amine produces N - Nitrosoamine.
- wherein
Option 1)

This option is incorrect.
Option 2)

This option is incorrect.
Option 3)

This option is incorrect.
Option 4)

This option is correct.