CREATE TABLE table_43435 ("Locomotive number" TEXT, "Model" TEXT, "Type" TEXT, "Propulsion" TEXT, "Manufacturer" TEXT)

What type is locomotive number CTN 46?
SELECT "Type" FROM table_43435 WHERE "Locomotive number" = 'ctn 46'
SELECT "Type" FROM "table_43435" WHERE "Locomotive number" = 'ctn 46'