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The compound does not exhibit geometrical isomerism because two identical methyl groups are attached to the same carbon atom.

1. CH₃
2. CH₃
3. CH₃
4. CH₃

Correct answer: CH₃

Solution

Geometrical isomerism arises due to restricted rotation around a double bond and requires two different groups on each carbon of the double bond. If two identical groups are attached to the same carbon, geometrical isomerism is not possible.

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