CREATE TABLE table_25738 ("Season" TEXT, "Oberbayern A" TEXT, "Oberbayern B" TEXT, "Niederbayern" TEXT, "Schwaben" TEXT, "Oberpfalz" TEXT)

When esv ingolstadt is the oberbayern b what is the niederbayern?
SELECT "Niederbayern" FROM table_25738 WHERE "Oberbayern B" = 'ESV Ingolstadt'
SELECT "Niederbayern" FROM "table_25738" WHERE "Oberbayern B" = 'ESV Ingolstadt'