Fill cell from userform (one out of several checkboxes)

I am sure someone else has asked this, but I can't find a post with an answer that fits my situation. I am trying to fill and excel sheet from a userform. The first cell will be filled with one of several choices that are available. Each choice is allotted its own checkbox. This is due to the format of the paper form that my database is based off of. The picture shows the separate checkboxes. How would I go about this? And is it possible to ensure that only one checkbox is used at a time?

Any assistance will be appreciated.