Hey there!

There are many opportunities after completing class 12th with PCB majors.

For starters, you can pursue B.Sc. in a subject of your choice (Biochemistry, Zoology, Botany, Microbiology, Chemistry and the list is endless), followed by Masters in any scientific major. After which you can get into the scientific research field (by pursuing PhD).

The best part about the scientific research is that, it has a lot of potential and hidden knowledge that we yet have to discover to ease our lives. Plus being a scientist has its own perks. And their demand is unending. Also, their salary differs. Depending on what kind of scientist you turn out to be and where you're working, your average salary per year would be around 50,000 dollars to 100,000 dollars.

Apart from that, even if you do not want to get into academics and research, after completing your B.Sc., you will be eligible to apply for many governmental posts and related exams, for instance, UPSC, Bank PO etc. Again, each of their salary differs.

Hope this helps.

Good luck!