Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_24673888_1 (callsign VARCHAR, station_type VARCHAR, ch__number VARCHAR)

### Question ###
What is the callsign that has a station type of relay and a channel number of TV-2?

### Accurate SQL ###

SELECT callsign FROM table_24673888_1 WHERE station_type = "Relay" AND ch__number = "TV-2"