CREATE TABLE table_77717 ("Constituency" TEXT, "Conservative" TEXT, "Labour" TEXT, "Liberal Democrats" TEXT, "Plaid Cymru" TEXT, "Result" TEXT)

What constituency does the Conservative Darren Millar belong to?
SELECT "Constituency" FROM table_77717 WHERE "Conservative" = 'darren millar'
SELECT "Constituency" FROM "table_77717" WHERE "Conservative" = 'darren millar'