CREATE TABLE table_52858 ("Station Number" TEXT, "District" TEXT, "Location" TEXT, "Type" TEXT, "Appliances" TEXT, "Registrations" TEXT)

What is the registration of the station with a retained type and a station number of c03?
SELECT "Registrations" FROM table_52858 WHERE "Type" = 'retained' AND "Station Number" = 'c03'
SELECT "Registrations" FROM "table_52858" WHERE "Station Number" = 'c03' AND "Type" = 'retained'