question: What is the Constituency number for Bikhangaon with a Reserved for ( SC / ST /None) of st?
answer: SELECT constituency_number FROM table_name_11 WHERE reserved_for___sc___st__none_ = "st" AND name = "bikhangaon"
context: CREATE TABLE table_name_11 (constituency_number VARCHAR, reserved_for___sc___st__none_ VARCHAR, name VARCHAR)