Preparation of Bakelite proceeds via reactions:
Option: 1 Electrophilic addition and dehydration
Option: 2 Condensation and elimination
Option: 3 Nucleophilic addition and dehydration
Option: 4 Electrophilic substitution and dehydration
Preparation of Bakelit follows Electrophilic substitution and dehydration reaction:
Therefore, Option(4) is correct
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