Is this the right way to write about choices limitation.
Students' choices should be restricted\limited to\in vocational courses.
Your choices are limited to\in the following options (a or b or c)
Both to and in are correct, but the meaning is radically different.
to -> the only possible choices are presented next
in -> the choices in (what is next) are limited
restricted to vocational courses = only vocational courses are allowed
restricted in vocational courses = when speaking about vocational courses, choices should be limited
limited to the following options (a or b or c) = only options a or b or c are possible
limited in the following options = (it does not actually make sense)
I would say:
Students' choices should be restricted\limited to vocational courses.
Your choices are limited to a or b or c