@Raji15 

 correct  me if i'm wrong

you have reference type field (business line) which refer to organization table.

you need prefill business line with lowest org value of user which data is available in organization table

and organization table has only org values 1,2,3....and organization name

and user table has organzation name field data?

what is the relation between user record organization and organization table?? if we have common field between user oragnization and org table then we can write a logic