sorry which is the best

Sorry i have wrong...
Now I have 3 database A,B,C is working in Interbase v 5.6,
but Interbas v 5.6 is no longger can hold what the client wants,
I will conver it in Postgresql, I need your advice which is the
bertter result:

(1):
 unika
   |
   |------ A (schema)
   |------------ B (schema)
   |------------------- C (schema)

(2) create database A, create database B, create database C

thank you all