Dear Shubham roy
For IIt JEE you can have only 1 attempt after 12th
so this is your last attempt. but you have prepeared only coordinate ,differential calculus and probability in maths.
You have left many topics. for IIt JEE you have to pass all the three subject .if you will fail in maths then you can get admission in IITs.
So I will suggest you to prepear whole syll.you have still lot of time left.
Please feel free to post as many doubts on our discussion forum as you can. If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.
We are all IITians and here to help you in your IIT JEE preparation.
All the best Shubham.