Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_27 (registrations VARCHAR, type VARCHAR, station_number VARCHAR)
### Question:
What is the registration of the station with a retained type and a station number of c03?
### Answer:
SELECT registrations FROM table_name_27 WHERE type = "retained" AND station_number = "c03"