[OT] Fetch First 1 row only does not work in subquery

Hi
I am trying a query like below
select col1, col2 from table1 where col3 = (select cop1 from table2 where
cop2='abc' fetch first 1 row only)

But it does not like fetch first 1 row only in subquery,
Table2 will return multiple rows for cop2='abc' condition, i want to select
first 1 row.

In table2, i have column cop3 which is numeric and will have numbers is
ascending order, can i use this column some way to get the first row only?

how can i do so

Any suggestions