Your friend is good at eng, history & geography. however his parents feel. he should continue to persue science and become a doctor, even though he is not good at science .
what your friend can do to convince his parents and what career option he could persue

I'm not sure of exactly what answer you're looking for here or if this is suppose to be an English essay, but I'll give it a try.

Your friend could try to calmly talk to his parents and explain why he feels he shouldn't pursue a career as a doctor because he isn't good at science.

Also, he could show them the good grades he gets in English, History, and Geography and explain why he should pursue a different career that has to deal with those subjects that he is good at.

Prove to them that a different career would be a better option and maybe he could even get his teacher to vouch for him.