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_2640 ( "Party Name" text, "States contested" real, "Seats contested" real, "Seats won" real, "No. of Votes" real, "% of Votes" text, "% in Seats contested" text, "Forfeited in seats" real )

### Question ###
What is the lowest number of states contested under apna dal?

### Accurate SQL ###

SELECT MIN("States contested") FROM table_2640 WHERE "Party Name" = 'Apna Dal'