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