• Answer:
[tex] \Large{\boxed{\sf Option \ A) \ 2,3-dimethylhexane}} [/tex]
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• Explanation:
Paying close attention to the molecule, we notice that the longest continuous carbon chain has 6 carbon atoms. Therefore, its name will contain "hex" . Here, it will be "hexane."
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Now, we can see that two methyl groups (-CH₃) are attached to the second and third carbon atoms of the main chain.
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Thus, we'll write "2,3 - dimethyl..." to indicate that there are 2 (di) methyl groups (methyl) attached to the second and third carbon atoms, which is why we add the locants: "2,3 - ..."
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[tex] \Large{\implies \boxed{\boxed{\sf Option \ A) \ 2,3-dimethylhexane}}} [/tex]