The structure of isobutyl group in an organic compound is

Options

A. (1) `CH_(3)-underset(|)(CH)-CH_(2)-CH_(3)`
B. (2) `CH_(3)-CH_(2)-CH_(2)-CH_(2)-`
C. (3) `CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C )-`
D. (4)

Explanation

To determine the structure of the isobutyl group in an organic compound, we can follow these steps:

### Step 1: Understand the Isobutyl Group
The isobutyl group is a branched alkyl group derived from butane. It is specifically known as 2-methylpropyl.

### Step 2: Identify the Carbon Backbone
The isobutyl group consists of a total of four carbon atoms. The structure can be visualized as a three-carbon chain (propyl) with a methyl group (–CH₃) attached to the second carbon.

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