Which of the following are saturated hydro carbons?

[BTe]

Homework Statement

I did my chemistry diploma yesterday and a numerical response question asked which of the 4 are saturated hydrocarbons?

I can't remember all of them but here's what i remember:

Homework Equations

--N/A--

The Attempt at a Solution

**sorry I can't illustrate the hydrocarbons, but ill try my best to explain**

I managed to figure out three of them, as they were single bonded - alkanes, and it came down to 3 left.

2 of which had c=c bonds, and one had a c-c=o bond and also branched off with OH - making it a carboxylic acid.

The single bonded to double bond O c-c=o would be saturated right?

 

[Borek]

Carboxylic acid is not a hydrocarbon, so depending on the exact wording it could be either a trick question, or it asked about a side chain (only carbon-carbon bonds are taken into account when determining saturation).

 

[BTe]

Okay, the exact wording probably went along the lines of which include saturated hydro carbon groups. So in that case, using elimination, I know that the other 2 compounds with c=c bonds are incorrect, leaving me with this last carboxylic acid. Thanks!