Table: lok_sabha_shajapur
Columns: constituency_number
name
reserved_for_sc_st_none
district
number_of_electorates_2003

Question: Which district had SC reserved and 169 Constituents?
SQL: SELECT "district" FROM lok_sabha_shajapur WHERE "reserved_for_sc_st_none" = 'sc' AND "constituency_number" = '169'

Question: What was reserved in the district that has 169 constituents?
SQL: SELECT "reserved_for_sc_st_none" FROM lok_sabha_shajapur WHERE "constituency_number" = '169'