FQT Multiple choice placeholders
From MoodleDocs
In addition to the answer box placeholders, the Formulas question type provides for two other types of placeholder for multiple choice answers:
- Dropdown menu placeholder
- Radio buttons placeholder
The syntax for this placeholder is: {_n:choices:MCE} where MCE must appear as is for a dropdown menu.
_n is the nth answer of the subquestion, starting at 0, and MCE