Hello Ahan,

Since after competition of your B.Sc Physical Science you become a graduate which means now you are eligible for every exam which is needs the eligibility of you being graduate like UPSC Civil Services Examination or UPSC Combined Defence Services Examination or if you want to study further you can go for post graduation in your respective field because if you would go for a job then you won't get what expect so I would suggest you to go for your interest whatever you want want.

I hope my answer have helped you and hope you do well in future.