what are the inscriptions printed on all of the three caskets ? who chooses the correct casket? how do you know it.....

Gold- "Who chooseth me shall gain what many men desire."

Silver- "Who chooseth me shall get as much as he deserves." 

Lead- "Who chooseth me must give and hazard all he hath." 

Bassanio ends up picking the lead casket. The inscription personifies what each person must give to a marriage. Bassanio wins Portia.