Question: What is the name of department where has the largest number of professors with a Ph.D. degree?
SQL: SELECT T2.dept_name ,  T1.dept_code FROM professor AS T1 JOIN department AS T2 ON T1.dept_code  =  T2.dept_code WHERE T1.prof_high_degree  =  'Ph.D.' GROUP BY T1.dept_code ORDER BY count(*) DESC LIMIT 1