B.Tech Scope

For this course, there is no scope in India, but yes in other countries there is a wide scope for such type of courses.

It's not a good option because both are completely different fields. So, you should continue your engineering field.

If you want to join merchant navy, you have to complete a one year course.

For getting admission in B.Tech, you need to give any one entrance exam and than only you can get admission. Entrance exam like BITSAT, SRMJEEE and many more after getting score only, we can decide about the college.

As students get confused what to choose next, here is one Expert from Shiksha.com, who has blogged about the future aspects after B.Tech, which can be pursued for a brighter future. This link will help you get an idea on what to pursue next to create value to your profession. https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/engineering/articles/amp/what-after-btech-know-your-options-blogId-14784&ved=2ahUKEwjFqMfCycjaAhWEs48KHShDC1oQFjAGegQIAhAB&usg=AOvVaw1r58cIj18QFiFxSMQqust5&cf=1
All the very best.

Yes, you can go for MBA as you have already spent lot of years in studying B.Tech. Doing MBA will enhance your management skills.

Both are divergent from your B.Tech though, getting a professional degree may help.

Dear Submit!
That's the best combination. Since you are already done you B.Tech in IT and in addition to that, you are having the more than 5 year of core technical expertise. That's would be great if you continue your specializations. Because this does't require more efforts from your side and you will be able to cover all the critical aspects with high paying job. Good Luck.

You need to discontinue B.Sc if you want to pursue B.Tech in IT. You will have to take admission in the 1st year of B.Sc in IT.

For JEE, maximum weightage is taken from 12th when compared to 11th in CBSE. If your 12th score is not enough for JEE weightage then you need to score little more in JEE Mains. This could help you in getting a seat in technological colleges.