distinct problem

hi 

this is my store procedure

ALTER procedure [dbo].[electricmenu]	
as
begin
select distinct Classification,H_name
from House_p
where H_name='Electric'
end

it worked correctly but now i need id column that is primary key when i change sP to this

ALTER procedure [dbo].[electricmenu]	
as
begin
select distinct Classification,H_name,ID
from House_p
where H_name='Electric'
end

distinct didn't worked it show all data from classification column. i need both id & calssification column data what should i do?

best regards