CREATE TABLE table_65315 ("Constituency number" TEXT, "Name" TEXT, "Reserved for  (  SC / ST /None ) " TEXT, "District" TEXT, "Number of electorates  ( 2003 ) " FLOAT)

What is the Constituency Number when the Number of Electorates (2003) is more than 156,910, and Reserved for sc?
SELECT "Constituency number" FROM table_65315 WHERE "Number of electorates (2003)" > '156,910' AND "Reserved for ( SC / ST /None)" = 'sc'
SELECT "Constituency number" FROM "table_65315" WHERE "Number of electorates (2003)" > '156,910' AND "Reserved for ( SC / ST /None)" = 'sc'