Hello vivek,

First of all congratulations on completing your 12th class.

Unfortunately no, you won't eligible for the BITSAT criteria . If  you are willing to take the exam should have obtained minimum 75% aggregate in your Physics, Maths and Chemistry or obtained minimum 75% aggregate in your Physics, Biology and Chemistry . At least, the candidates should have  60% marks in each of the Physics, Chemistry, and Mathematics / Biology subjects. The overall score of 85% doesn't play a role on the criteria.