If I get 286 in aiats medical , what will be my rank in India?

Hi Aspirant,
This is a very difficult question to answer.This is simply because of the fact that you cannot compare ranks of a test taken by a private Institute to the national rank obtained in the exam.Many times you will find that the ranks of a student in the two tests are contrastingly different.
What you must realise is use the test to examine yourself.Look at your positive and negative aspects and work accordingly.Also,adapt to the real exam scenario in a much better way by solving previous years questions papers and mock papers.Properly evaluate your test performance and do hard work in improving your weaker areas.
Hope this helps.