The structure of isobutyl group in an organic compound is:

57 2013 NEET Organic Chemistry - Some Basic Principles and TechniquesNomenclature Easy
The structure of isobutyl group in an organic compound is:
A $(CH_3)_3C-$
B $(CH_3)_2CH-CH_2-$
C $CH_3-CH(-)-CH_2-CH_3$
D $CH_3-CH_2-CH_2-CH_2-$

Detailed Solution

$(CH_3)_3C-$ is tert-butyl; $(CH_3)_2CH-CH_2-$ is isobutyl; $CH_3-CH(-)-CH_2-CH_3$ is sec-butyl; $CH_3CH_2CH_2CH_2-$ is n-butyl.

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