The correct IUPAC name for the following structure is

4-Bromo-3-methylheptanal

The correct answer is Option (4) → 4-Bromo-3-methylheptanal

1. Functional group present
   The structure ends with –CHO, so it is an aldehyde → suffix heptanal (not heptanol).

2. Longest carbon chain
   The parent chain has 7 carbons, including the aldehyde carbon.

3. Numbering rule
   Numbering starts from the aldehyde carbon.

4. Substituents and their positions

   • Methyl group on carbon 3

   • Bromo group on carbon 4

5. Alphabetical order of substituents
   Bromo comes before methyl.

Final IUPAC Name: 4-Bromo-3-methylheptanal