Provide the IUPAC name for the following compound: a. 2,4,5-Trimethyl-4-propylheptane b. 4-Isobutyl-4,5-dimethylheptane c. 4-sec-Butyl-2,4-dimethylheptane d. 3,4,6-Trimethyl-4-propylheptane e. 4-Isobutyl-3,4-dimethylheptane

Complete Question

The complete question is shown on the first uploaded image

The correct option is A

That is 2,4,5-Trimethyl-4-propylheptane

Explanation:

Looking at the structure the longest carbon chain is 7 as shown on the second uploaded image

Also from the diagram of the structure we can identify that is longest chain has 3 methyl group attachment and one propyl group  attachment  

 Now going through this longest chain the numbering of this attachment them the lowest number is the correct way so as we can see

  2,4,5-Trimethyl-4-propylheptane  gives the lowest numbering compared to 3,4,6-Trimethyl-4-propylheptane so the correct IUPAC names is 2,4,5-Trimethyl-4-propylheptane

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i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a