NIT

With AJEE Main rank of 61884 and OBC category rank of 18,000, you have a decent chance of getting admission in some of the NITs and IIITs for B.Tech in Biotechnology or related branches. However, the availability of seats and cutoffs vary every year and across colleges, and the information about the same for the year 2022 is not available as of now. Here are a few NITs and IIITs that offer B.Tech in Biotechnology, and you may consider them for admission based on your JEE Main rank and availability of seats:
National Institute of Technology, Raipur
National Institute of Technology, Warangal
National Institute of Technology, Durgapur
National Institute of Technology, Rourkela
Indian Institute of Information Technology, Allahabad
Indian Institute of Information Technology, Sri City
Indian Institute of Information Technology, Vadodara
It is important to note that the admission process and cutoffs vary for each college, and you should check the official websites of these institutes for the latest information on cutoffs, eligibility criteria, and the admission process. You may also consider applying to other colleges based on your preference and availability of seats in the respective colleges.

Based on the general trends, a rank of 50350 in the EWS category might be difficult to secure a seat in a top NIT or IIIT for a computer Science programme. It is recommended to check the cutoff ranks for the previous years' admissions for the specific institutes and programme to get a better idea of the rank required for admission. You can also check the official websites of the NITs and IIITs to know the eligibility criteria and cutoff ranks for the current academic year. In case you do not secure a seat in your desired NIT or IIIT, you can also explore other engineering colleges and universities that offer good computer Science programs. It is important to choose a college that has a good reputation, experienced faculty, and good placement opportunities.