What are the code and description of the most frequent behavior incident type?
return behavior incidents ;return types ;return number of  #1 for each  #2 ;return the  #2 where #3 is  highest ;return the  code of  #4 ;return the  description of  #4 ;return #5 ,  #6
['select', 'select', 'group', 'comparative', 'project', 'project', 'union']