0
WBA stands for World Boxing Association.
yes
1) World Basketball Association
2) World Boxing Association
impossible
Mexico: 9 puerto rico: 0, current boxing world champions...
http://en.wikipedia.org/wiki/List_of_current_world_boxing_champions
Here is a list of total (although this list is from 2010):
http://www.boxingscene.com/forums/showthread.php?t=425414