Yer right, Todd - Crosman 122 - commonly known as the CG gas gun, using a 4oz CO2 tank, suspended vertically beneath the receiver.
***However***
After re-reading it myself, the quiz was based upon the three different rifle actions, that used the 12 gm powerlets, in .22 cal. Very important to read and understand the question, which I hadn't done prior to my original answer. LOL !!