CBSE 12th

Check the syllabus with your board on their website or these days all sample papers carry the syllabus with weightage. The 12th boards always have complete syllabus in exams so prepare accordingly.

Hi
So you did not study at all for these 4 years? If yes, then take up some diploma course from an ITI or Polytechnic and start a job. There after you can go for lateral entry for b.tech if that still interests you or simply take a B.Sc degree to keep your self qualified for better jobs.

Hi
What course are you looking for? You have to check with the respective state board to see if they offer any scholarship or not. Take a look at the following link to see if you can get one.
http://updatebro.com/list-of-scholarships/
All the best

Apart from MBBS, you have a whole list of courses that can be done but you need to know your core strengths and skills first. MBBS is definitely difficult to crack so keep your alternatives open.

After completing BiPC, you can study B.sc. in subjects like zoology, botany, Geology, MBBS, B.pharmacy, D.pharmacy, Veterinary Science and physiotherapy to name few. You must pursue a course which interests you and you enjoy studying the most.

Go for that in which you are interested.

What is your category?

It is near to impossible.