Hey P Bisai !

There are basic rules for getting through any competitive exam n so is there for BHU entrance exam for bsc.

Let me tell you in a nutshell about all the tops n tricks that may lead to ur success

1. Go through all the previously years question papers of the entrance test. BHU provides previous online test papers in it's own official site. U must go through it
2. Secondly after roughly analysing the question papers look for the syllabus available for the entrance in it's official site.
3. Now u have completed 50%of ur tasks. After collecting all the above information start preparing according to the pattern of the exam
4. Don't forget to practice the mocks. they are the key to any competitive exam. U may practice the previous question papers as well the books available in the markets
5. Dont forget ur basic concept is all u need to get through. U not looking for IIT. So just clear all your doubts . Command over formulae. N numerical is a must to do thing
6. Yes.. have faith in urself n confidence that u can Excel. Start preparing with honestly and smartly.     

Feel free to ask further.