Help in choosing subjects for higher

Hi i am currently doing Nat 5 with all 3 sciences and history.i am choosing bio,chemtry and maths in Higher n want a easy subject along with them.i m thinking to choose history bt i think it's not easy to get A in a subject where u have to write alot.
TIA

The best advice I can personally give you is to crash higher business or admin (if your school allows that), very easy highers and very good for future jobs as many of the skills earned are those required by employers especially with so many jobs using a computer.

I want to do medicines and want to do all my focus on bio maths n chemistry tats y asking nn easy 4th subject

Yeh I would still suggest business or admin.