CREATE TABLE table_29785324_5 (constituency_no INT, vidhan_sabha_constituency VARCHAR)

How many were in the Kargahar (vidhan sabha constituency)?
SELECT MIN(constituency_no) FROM table_29785324_5 WHERE vidhan_sabha_constituency = "Kargahar (Vidhan Sabha constituency)"
SELECT MIN("constituency_no") FROM "table_29785324_5" WHERE "Kargahar (Vidhan Sabha constituency)" = "vidhan_sabha_constituency"