You have really very great subject combination.

You should opt for a MSc. You have read the three subject and by this year , you got interested in some of them. Choose that subject and pursue your MSc. If you want you can also go for BTech Biotechnology after your BSc by giving lateral entry exams. If you pursue BTech then you will get direct admission in BTech 2nd year.

Pursue your education and you have a great future left ahead!

Have a great eve!