Computers & IT (Non-Engg)

Yes, polytechnic diploma is equivalent to intermediate that is 12th. You can get admission in B.Sc degree course in lateral entry mode after clearing polytechnic diploma course.
B.Sc Lateral Entry:
Duration: 2 years (Semester System)
Eligibility criteria (Qualifying Exam):
You have to clear 3 year's Diploma course after clearing 10th with minimum 50% aggregate marks in diploma course.

This is Bachelor in Technology in computer science and another is Bachelor in Science CS.
BS is Engineering Qualification In USA and in India It is B.Tech.

It depends on your personal interest as you are the person who has to study. If you are interested in research and want to explore computer science then you should go for M.Sc as you already have science background. If you are interested in professional type of course then only you can go MCA. In keeping view of the present recession in the IT stream my sincere suggestion would be M.Sc in your case.

Galgotias University is a reputed and government recognized university. They have huge infrastructure, great faculty and good placement record. Visit their official website to know more in detail.

Acharya College is good for BCA. They have good infrastructure and faculty team. Check their Last few year placements record on their official website.

BCA is a hot and demanding career these days. If you want to make your career in IT industry then it's the right path.

If you want to become a software engineer then BCA+MCA is the right course for you.