Below is the mass spectrum of an unknown hydrocarbon.In addition,this hydrocarbon shows characteristic absorption at 2100 cm−1 in its IR spectrum.Give the structure of this unknown. 
Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/
Definitions:
Intellectual Disability
A developmental disorder characterized by significant impairments in intellectual functioning and adaptive behavior, affecting everyday social and practical skills.
Intelligence Score
A numerical representation of an individual's cognitive abilities as compared to the norm, usually determined by standardized testing.
Cognitive Delays
Developmental delays in which a child has difficulty achieving cognitive milestones appropriate for their age.
Problem-Solving Strategies
Methods or approaches used to overcome obstacles, resolve conflicts, or find solutions to complex issues.
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