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_21573750_2 (general_classification VARCHAR, stage VARCHAR)

### Question ###
When 4 is the stage who is the general classification?

### Accurate SQL ###

SELECT general_classification FROM table_21573750_2 WHERE stage = 4