When you have a question stem with multiple blanks that students will fill in, when typing in the choice options for each blank you can only select with the radial buttons a correct answer for one set of choices. The other appears to default to the correct response being the first in the list.
As an example, in the sample below I can select a radial button next to either the possible choices for blank 1 or blank 2, but not both. If I select "red" for blank 1, then when I save the question "purple" is automatically set as the correct answer to blank 2.
This document was generated from the following discussion: [Correct choice selection problem with multiple fill-in-the-blank options]