Grade 8-Grade 9 IB transition - Subjects Help - Engineering

Hi - I am currently in the stage of choosing my subjects. I am in the MYP program, and i do not know if i should take

option 1 - Chemistry and Physics
or
option 2 - Physics and Computer Science

I cannot take all 3, however.

I do not know what i will become in the future, but probably an Engineer (Computer) or Scientist (cosmologist or physicist). Is Chemistry required for taking engineering (computers), physics, astrophyiscs, or cosmologist? Please guide me!

Thanks a lot!