What is the order of studying mathematics courses at Khan Academy?

Question

Mathematics

Hello!
Yesterday I created an account on khan academy to study mathematics (for university admission). I faced the problem of not knowing in what order to study the courses.
First option:
Arithmetic ---> Prealgebra ---> Algebra 1 ---> Geometry ---> Algebra 2 ---> Trigonometry ---> Probability and statistics ---> Precalculus.
Second option:
Math I ---> Math II ---> Math III.
Third option:
Algebra I ---> Geometry ---> Algebra II.
Fourth option :
1st grade ---> 2st grade ---> 3st grade ---> 4st grade ---> 5st grade ---> 6st grade ---> 7st grade ---> 8st grade --> high school.