CREATE TABLE table_62768 ("Constituency number" TEXT, "Name" TEXT, "Reserved for  (  SC / ST /None ) " TEXT, "District" TEXT, "Number of electorates  ( 2003 ) " FLOAT)

Which district had SC reserved and 169 Constituents?
SELECT "District" FROM table_62768 WHERE "Reserved for ( SC / ST /None)" = 'sc' AND "Constituency number" = '169'
SELECT "District" FROM "table_62768" WHERE "Constituency number" = '169' AND "Reserved for ( SC / ST /None)" = 'sc'