Database: financial
Question: Which district has the most accounts with loan contracts finished with no problems?
SQL: SELECT T1.A2 FROM District AS T1 INNER JOIN Account AS T2 ON T1.District_id = T2.District_id INNER JOIN Loan AS T3 ON T2.Account_id = T3.Account_id WHERE T3.status = 'A' GROUP BY T1.District_id ORDER BY COUNT(T2.Account_id) DESC LIMIT 1