2,3 - dimethylpentane\n3,4 - dimethylbutane\n3,4 - diethylpentane\n2,3 - diethylbutane

2,3 - dimethylpentane\n3,4 - dimethylbutane\n3,4 - diethylpentane\n2,3 - diethylbutane
Answer
Explanation:
Step1: Identify the longest carbon - chain
The longest carbon - chain has 5 carbon atoms, so it is a pentane.
Step2: Locate and name the substituents
There are two methyl ($-CH_3$) groups. One is on the 2 - carbon and the other is on the 3 - carbon.
Answer:
2,3 - dimethylpentane