Hello hello !!

I hope you are doing well. I am very sorry to say that if you are not attempted the first session of bitsat then you will also not allowed to attempt the second one. Yes , ofcourse it is very compulsory to write the bitsat session 1. Because as per the eligibility criteria , a candidate who has not applied for the bitsat session 1 will not be allowed to apply for session 2. So , sorry.

I hope you understand.

Good luck !!