Answer:
Pentane
Explanation:
This is a little hard to look at and figure out what's going on, but I think I got the gist of it. Hydrocarbon naming is fairly simple. They are essentially named based on how many carbons make up the "skeleton." The prefix denotes how many there are, and as we can see, there are five hydrocarbons.
Hex- means six, so this is not correct.
Hept- is not one we see quite often, but it is seven, which again is not correct.
Oct- is eight. Still not five.
Pent- means five. And there you go, there is the answer.
