USA

I would suggest you to complete your 12th and then decide to go abroad because there are wide options available after 12th.

USA neither accept MBBS nor BDS as an acceptable qualification to practice in US. BDS is dental and not a medical course. MBBS has validity only in India, Nepal, Srilanka, Bangladesh and Bhutan. In US, you need to first complete a 4 years Bachelor's degree in life science and then need to complete a medical degree from there only.

Technically, none of the good and reputed institutes offer MBA program to a fresher average experience required for a 2 years program is 5+ years and for 1 year MBA program is the 10+ years. You may find some one ranked institutes whose name you never heard offering MBA program for fresher but then you may not get placement or not good placement at all. Even if the B school does not say clearly about experiences required, it is difficult to get admission without 2+ years experience. An MBA program without some hands on leadership experience is not worth too.

Hi Akanksha,
GRE preparation may take around 3 to 5 months depending on your own caliber, convenience etc. It is good practice if you begin by taking a mock test, you will know where you stand and you can be your revision accordingly. Focus on areas where you need improvement, however, don't underestimate areas of strengths, these topics or areas will give you the scope to score higher. Take mock tests regularly before and after a revision. Good luck.

Hi Manaswani,
Very good academic grades throughout, you have to display high intellect. You must also hold a Bachelor's degree in a relevant field and must clear the LSAT. TOEFL or IELTS are generally not required but differs from university to university. For university specific entry requirements please visit the websites, check the class profiles to have an idea.

You have already been told that GMAT is compulsory by another expert. Understand that for MBA abroad rules are the same. For TOEFL preparation check: ets.org/toefl

Hi Siddhant,
A good list is provided on Shiksha, you will find a lot of options. Check here:
https://studyabroad.shiksha.com/be-btech-in-aerospace-engineering-from-abroad-ds11510269?country=usa-uk-canada

International students are allowed to do only full time courses. Part time courses are meant for local students. International students will get visa only for full time programs