Which of the following is not another representation for 2-methylbutane? 
Definitions:
Inferiority Complex
A psychological condition in which an individual feels a deep sense of inadequacy, stemming from real or imagined deficiencies, often leading to overcompensation or withdrawal.
Playground Bullies
Individuals, often children or adolescents, who use power to harm or intimidate others in a school setting.
Self-Identity
The perception or awareness one has of oneself as a distinct, continuous entity with individual characteristics, values, and history.
Father Substitute
A person who takes on the roles or attributes typically associated with a father figure, in instances where the biological father is absent or unavailable.
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