Hello dear student!

The result depends on the performance of students as well as difficulty level of question paper so we can't predict anything. If we talk about result dates, then result of 12th board examination of bihar school board of examination is expected in between last week of March to 1st week of april and the result of class 10th board examination is expected in April(1st-2nd week).

Talking about biology paper of class 12th , all the questions are being asked from biology book of NCERT so go through the whole book 3-4 times before examination. Biology is a very scoring subject so with little effort you can score very good marks. You can also check the previous years's papers for taking a basic idea about the pattern of the paper. otherwise mostly the paper is easy.