How to get into Birla Institute of Technology, Mesra - Patna Extension Center for UG/PG courses? What's the eligibility for admission?

Admission into BIT Mesra – Patna Extension Center requires 10+2 with around 75% marks and a valid JEE Main score for B.Tech courses. Admissions occur via JoSAA or CSAB counselling process somehow. Candidates need relevant degree for PG courses like M.Tech or MBA and scores in GATE or institute level