Hello Mrunal,

From beginning of +2 you start preparation for nid portfolio . Because, for any competative exam preparation starts early you got good results

Just seven rules for success in comtetative exams

1. Start from basics and concepts
2. Solve different types of problems
3. Prepare your own questions and try to answer them.
4. Improve your accuracy and speed it will attain when you slove more problems.
5. Solve mock tests and previous year papers.
6. Before 2 weeks of exam just revise your concepts
7. Maintain good health and sleep before exam day

I hope you got it!!!!!

All the best!!!!!