Hi, you've asked an unclear question. However, I assume you're referring to levels of college selectivity.
Three levels of selectivity (college selectivity) are:
Most selective
Extremely selective
Very selective
Most selective: Colleges with this level of selectivity are said to accept fewer than 15% of all applicants, examples include, Harvard University, Johns Hopkins University, Stanford University
, Massachusetts Institute of Technology.
Extremely selective: Colleges with this level of selectivity are said to accept fewer than 35% of all applicants. Institutions under this category include Boston University, New York University, Georgia Institute of Technology, etc.
Very selective: The Colleges under this category accept fewer than 50% of all applicants. Examples are George Washington University, Kenyon College, Lafayette College,
North Carolina State University, etc.
These are some of the selectivity levels, you could find more Information from other online resources.