The major product of the following reaction is:

The reaction occurs in presence of $$\mathrm{NaOH/EtOH}$$, which favours:

$$\mathrm{E2\ Elimination}$$

The base abstracts a $$\mathrm{\beta}$$-hydrogen adjacent to the carbon bearing chlorine.

Removal of the vinylic hydrogen is unfavourable, so the proton is removed from the neighbouring $$\mathrm{sp^3}$$ hybridised carbon containing the methyl group.

Simultaneously, the chloride ion leaves and a new $$\mathrm{\pi}$$ bond is formed.

This elimination produces a:

$$\mathrm{Conjugated\ Diene}$$

Conjugated dienes are highly stable due to delocalisation of $$\mathrm{\pi}$$ electrons.

Hence, the major product formed is the conjugated methylcyclopentadiene structure.

Correct Option: $$\mathrm{B}$$