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_89 ( userpics_free VARCHAR, monthly_cost_for_paid_account VARCHAR, s_registered_user VARCHAR )

### Question ###
What is Userpics Free, when Monthly Cost For Paid Account is 'unknown', and when S Registered User is 2340?

### Accurate SQL ###

SELECT userpics_free FROM table_name_89 WHERE monthly_cost_for_paid_account = "unknown" AND s_registered_user = "2340"