Correct Answer: Option C

Explanation

Firstly, identify the parent name. Since the longest C-C chain is 4, the parent name is Butane.

Secondly, identify the substituent, i.e the other functional group attached to any of the c-c longest chain. We have a methyl group ( CH\(_3\) on C-2, hence the name, 2 - methyl

Thirdly, join the two names together i.e 2-methyl butane. 

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