CREATE TABLE table_1992 ("Stage  ( Winner ) " TEXT, "General Classification" TEXT, "Points Classification" TEXT, "Mountains Classification" TEXT, "Young Rider Classification" TEXT, "Team Classification" TEXT)

Name the mountains classification for alexander kristoff
SELECT "Mountains Classification" FROM table_1992 WHERE "Points Classification" = 'Alexander Kristoff'
SELECT "Mountains Classification" FROM "table_1992" WHERE "Points Classification" = 'Alexander Kristoff'