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The correct IUPAC name of the following hydrocarbon is :

1. 4,5 -diisopropyl-3-methylheptane
2. 3-methyl-4,5-diisopropylheptane
3. 5 -ethyl-4-isopropyl-3,6-dimethylheptane
4. 3-Ethyl-4-isopropyl-2,5-dimethylheptane

Correct answer: 3-methyl-4,5-diisopropylheptane

Solution

The parent chain is heptane, and numbering from the end that gives the lowest locants places the substituents at 3-methyl and 4,5-diisopropyl. This matches the correct IUPAC-style name among the options.

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