A. 2 – methyl butane
B. 2,2 – dimethyl butane
C. 2 – methyl pentane
D. 2,2 – dimethyl pentane

Correct Answer:

Option D = 2,2 – dimethyl pentane

Explanation

– The longest chain has five carbon atoms i.e PENT

– with two methyl attached to the second carbon atom

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