Biotechnology

No, B.Tech Biotechnology is not offered directly by Rashtrasant Tukadoji Maharaj Nagpur University (RTMNU). While RTMNU offers various engineering programs, a search for "B.Tech Biotechnology" at the university does not yield any relevant results. Several other colleges in Nagpur do offer the program, so you'll need to explore those options. 

With a JEE Main percentile of ~83, your All India Rank is likely around 150,000–200,000. Unfortunately, that's well above the closing ranks for B.Tech Biotechnology at NITs, which typically cap around 30,000–50,000 .So, no NIT is available for Biotechnology with your rank. Mechanical also would be out of reach. These branches close much earlier in counselling rounds.

With a CRL of 6 Lacs and OBC rank of 2.5 lakh, it's honestly quite tough to get Biotech or Environmental at DTU. Cutoffs are usually much lower, even for OBC. You might have better chances in spot rounds or try other state colleges.

No, Fergusson college does not conduct any entrance exam for its B.Sc courses. The admission to the B.Sc programmes are based on the marks obtained by the students in Twelth board exam.The candidates should have passed 12th with Science stream.