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NEET CHEMISTRYEasy

The isobutyl group among the following is:

A

Option 1 (Structure missing)

B

CH3–CH2–CH2–CH2–\text{CH}_3\text{–CH}_2\text{–CH}_2\text{–CH}_2\text{–}

C

Option 3 (Structure missing)

D

Option 4 (Structure missing)

Step-by-Step Solution

The isobutyl group is a branched alkyl group derived from isobutane by the removal of a hydrogen atom from a primary carbon. Its structural formula is CH3-CH(CH3)-CH2-\text{CH}_3\text{-CH(CH}_3\text{)-CH}_2\text{-} . The structure provided in Option 2 (CH3–CH2–CH2–CH2–\text{CH}_3\text{–CH}_2\text{–CH}_2\text{–CH}_2\text{–}) corresponds to the straight-chain n-butyl group. Because the structures for the remaining options are missing from the input data, the correct option cannot be definitively verified. Option 4 is marked correct based solely on the provided probable answer.

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