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Question:

The major product of the following reaction is: ABCD?

Solution:

The correct option is D. When an alkyl bromide is treated with C2H5ONa/C2H5−OH, it undergoes dehydrobromination. A molecule of HBr is eliminated and a C=C double bond is formed. In the present example, the C=C double bond is conjugated with the aromatic ring. This leads to stability.