Geo-Scientist Prelims 2022 Chemistry Q101: The major product formed in the following reaction sequence is

The major product formed in the following reaction sequence is

1. (a) Bicyclic allylic bromide with Br on the quaternary C2 and C=C at C3–C4
2. (b) 3-Bromo-α-pinene (Br on C3 of the endocyclic C2=C3 double bond, Me on C2)
3. (c) 3-Bromo-β-pinene (Br on C3, exocyclic C=CH₂ at C2)
4. (d) Bromo-alkene with Br on C3 of a C3=C4 double bond, Me on sp³ C2