CREATE TABLE table_name_19 (district VARCHAR(255), reserved_for___sc___st__none_ VARCHAR(255), constituency_number VARCHAR(255))
Name the  District that has a Reserved for ( SC / ST /None) of none and a Constituency number of 242?
    
SQL: SELECT district FROM table_name_19 WHERE reserved_for___sc___st__none_ = "none" AND constituency_number = "242"