option
One answer a choice question offers. The body is what the reader picks — inline content, so $maths$ sets. correct marks a right answer, and a choice without multiple has exactly one. The detail is feedback shown under the option when it was part of an answer the reader checked: the place to address the misunderstanding that option stands for, rather than restating the right answer.
option

#Attributes
correctMarks this option as a right answer.
Default
false#Allowed content
#Examples
option{ A hyperbola }(correct)option{ A straight line }[
A straight line would be a contour of a *sum*. The law multiplies,
so halving one factor must double the other.
]