You could even be none of them.  If you are a single member LLC that has not elected to be an S-Corp you are a disregarded entity and file it as a schedule C in your personal tax return.    Did you get a separate EIN for your LLC or do you just use your SSN?  

If your LLC is setup as any of those other business entities you will need to file a separate business return like a 1065 Partnership/LLC or 1120-C or 11-20 S corp return.  Only you know what kind of LLC you set up.

Did you read the instructions?  From the VERY limited amount of information you gave, I suspect it is NONE of those, and you would only check the first box.
<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/fw9.pdf">https://www.irs.gov/pub/irs-pdf/fw9.pdf</a>