Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_21515673_2 ( ranking VARCHAR, rr2_pts VARCHAR )

### Question ###
What is the rank when RR2 has 4 points?

### Accurate SQL ###

SELECT ranking FROM table_21515673_2 WHERE rr2_pts = 4