A Primera División team plays in which city that is located in the Cyuo region of Argentina?
San Martín de San Juan:  The team currently plays in the Primera División, the first division of the Argentine football league system. San Juan, Argentina: San Juan (] ) is the capital city of the Argentine province of San Juan in the Cuyo region, located in the Tulúm Valley, west of the San Juan River, at 650 m above mean sea level, with a population of around 112,000 as per the 2001 census (over 500,000 in the metropolitan area).
San Juan