CREATE TABLE table_31337 ("Constituency No." FLOAT, "Vidhan Sabha Constituency" TEXT, "Reservation for SC/ST" TEXT, "District" TEXT, "Lok Sabha" TEXT)

How many were in the Kargahar (vidhan sabha constituency)?
SELECT MIN("Constituency No.") FROM table_31337 WHERE "Vidhan Sabha Constituency" = 'Kargahar (Vidhan Sabha constituency)'
SELECT MIN("Constituency No.") FROM "table_31337" WHERE "Vidhan Sabha Constituency" = 'Kargahar (Vidhan Sabha constituency)'