I gave up my B.Sc in final year but now I want to complete it. How can I do so?

Yes, of course, you can appear for B.Sc Final year. Well, disadvantages are none. You would find your classmates slightly older than you bit who cares. I have known several people doing B.Sc. After 2 year gap and few after 3 year gap. They did not face any disadvantage. Hope this helps you. Be free