An Error Was Encountered

Error Number: 1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'cta' at line 20

SELECT DISTINCT c.classifiedID, c.orgName, c.typeID, c.city, c.state, c.contact, c.contactEmail, c.contactPhone1, c.contactPhone2, c.url, c.datePost, c.expire, c.description, c.title, c.regionID FROM classifieds AS c WHERE c.display > 0 AND c.expire > NOW() AND typeID = 173 ORDER BY city desc LIMIT 20 OFFSET cta