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_name_41 ( zone VARCHAR, camp_type VARCHAR, area VARCHAR )

### Question ###
What zone has camp type D/S in area Bl9?

### Accurate SQL ###

SELECT zone FROM table_name_41 WHERE camp_type = "d/s" AND area = "bl9"