It only took a minute to figure out, but I think the Multiple Choice should be renamed "Radio Buttons". You can't actually select multiple items, you can select one, which is the point of radio buttons. The Checkboxes option is clear since you can check multiple boxes (that one could actually be called Multiple Choice, since you can choose multiples.)
Actually, multiple choice could be applied to drop downs too (you're choosing from multiples, right?)
Please consider renaming Multiple Choice to Radio Button(s). Thanks.