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_44968 ( "Pollutant" text, "Type" text, "Standard" text, "Averaging Time" text, "Regulatory Citation" text )

### Question ###
what is the polluntant when the regulatory citation is 40 cfr 50.7(a) and the type is primary?

### Accurate SQL ###

SELECT "Pollutant" FROM table_44968 WHERE "Regulatory Citation" = '40 cfr 50.7(a)' AND "Type" = 'primary'