The correct IUPAC name of the following compound is:

First, examine the structure shown in the image. The molecule consists of a continuous carbon chain of seven carbon atoms, which is the longest possible chain, so the parent hydrocarbon is heptane.

Next, identify all substituents attached to this main chain:

• At carbon 3 there is an ethyl group (–CH₂CH₃).
• At carbon 5 there is a methyl group (–CH₃).

According to IUPAC rules, the chain must be numbered so that the substituents receive the lowest possible set of locants. Numbering from the left‑hand side of the skeleton gives the ethyl group at carbon 3 and the methyl group at carbon 5, which is the optimal numbering (the alternative numbering would place them at positions 4 and 2, giving the larger set {2, 4}).

Now assign the substituent names and their positions:

$3‑ethyl$ – because the ethyl group is attached to carbon 3.

$5‑methyl$ – because the methyl group is attached to carbon 5.

Combine the substituent names in alphabetical order (ethyl comes before methyl) and attach them to the parent name:

$3‑ethyl‑5‑methylheptane$

Thus, the correct IUPAC name for the compound depicted in the image is 3‑ethyl‑5‑methylheptane.