I am in Class 12. I want a complete study plan for biology. How should i study in order to have good score in boards. My aim is to get 90+. List all important topics with most important concepts and important questions from boards point of view.
Thank you.

@ shreyas 
biology have direct ques in board exam , so, u will not  face any kind of difficulties if u have properly studied ncert twice . 
just do the ncert twice alongwith exercise ques and 10 sample paper max . and last 5 years paper of biology and u will done with 95+ . 
but try to give point to point explanation in biology . and if possible prefer diagram always , 
here i am enlisting some of the imp topics of biology 
1- LAC OPERON MODEL 
2- 3 EXPERIMENT FOR FINDING OUT THE GENETIC MATERIAL 
3- CHROMOSOMAL ABNORMALITIES ( ANY ONE ) 
4- EXP RELATED TO DROSOPHILLA MELANGASTER 
5- LIFE CYCLE OF PLASMODIUM 
6- TYPES OF IMMUNITY AND ITS EXPLANATION 
7- VARIOUS METHOD FOR IVF |
8- BAGGING AND EMASCULATION DIFFRENCE 
9- CONTRACEPTIVES ( SAHELI ) SPECIALLY 
10- TYPES OF RELATION ( COMMENALISM , PARASITIM ETC ) 
just focus on these topics , and u will get good marks . 
and do the sample paper of askiitian , they prooves benificial to me . 
ALL THE BEST ..