A Primera División team plays in which city that is located in the Cyuo region of Argentina?
San Martín de San Juan Club Atlético San Martín, mostly known as San Martín de San Juan, is an Argentine football club from the city of San Juan. The team currently plays in the Primera División, the first division of the Argentine football league system.
Club La Unión Club La Unión (also known as La Unión de Formosa) is a sports club based on the city of Formosa, Argentina. The club is known for both its basketball and volleyball teams.