B.Sc.

To qualify for the 1st and 2nd-year intermediate exams, students must attain a minimum of 35% marks in both aggregate and individual subjects. This benchmark ensures a foundational grasp of the subjects covered in the intermediate curriculum, promoting a basic level of competence across various areas of study.

For B.Sc. admission eligibility, candidates are required to have completed their 12th grade with a minimum aggregate of 50%. Alternatively, individuals still awaiting their exam results are also considered, recognizing that some applicants may be in the process of completing their secondary education. Crucially, aspiring B.Sc. students must have studied core subjects like mathematics, physics, chemistry, and biology at the higher secondary level. This criterion is pivotal in ensuring that candidates possess a strong grounding in fundamental scientific principles, aligning with the specialized nature of Bachelor of Science programs.

By setting these criteria, the admissions process aims to admit students with a well-rounded academic background, prepared to excel in the diverse and challenging coursework of a B.Sc. program. The focus on both aggregate scores and specific subject requirements reflects the importance placed on a comprehensive understanding of core scientific disciplines for those pursuing a Bachelor of Science degree.

We can't compare the two both are well ranked in karnataka and india. 

It depends on your performance which will help you get placed but as per opinion I would prefer you REVA as the companies which are linked with it for placements are good. 

Reva University the highest package stood at Rs. 50 LPA. As per Reva University placement 2023, 10 international offers, 112 super dream offers, and 1349 dream offers were made. With a 57% placement rate, the IT/ITES sector stood out as the top sector. lakhs

Some of the top recruiters are Amazon, IBM, Dell, Wipro, Accenture, Cerner, PWC and many more.

The plus point of Reva is it's fee for B.Sc is lower than St. Paul

Finally, the perceived "better" choice is determined by personal preferences, career aspirations, and unique characteristics that correspond with a student's academic and personal interests. Prospective students may benefit from visiting both campuses, speaking with existing students, and extensively studying each school in order to make an educated selection based on their specific requirements and goals.

A few (4) of my seniors were placed in Dr. Reddy's lab with salaries around 9 lpa. It is a Science institute and a newly made placement cell. (because most of the students opt for higher education after the completion of their studies )Some students also go for government jobs. But as the institute has signed some MoU s with well established foreign institutes (with jku Austria, UDE in Germany, university of Pennsylvania in USA, RWTH Aachen in Germany to name a few) and the high standings in global rankings (placed 48th in young institutes contributing to quality research world-wide by nature, 2019). These factors contribute to a good enough background for a future PhD or MS in other countries. B.Sc in biological sciences is a top course in IISER Kolkata and has a better placement, having average package 7 LPA and higher package is approximately 14 to 15 LPA. 

Reputable centres for Science research and education in India are Presidency University, Kolkata and IISER Kolkata.

A five-year integrated B.Sc. (Hons.) programme in Biological, Chemical, Mathematical, and Physical Sciences is available from IISER Kolkata . Every branch offers special research opportunities and a distinct curriculum. Your interests and professional objectives will determine which branch is best for you.

A three-year B.Sc. (Hons.) programme in Physics, Chemistry, Mathematics, Economics, and Geology is available at Presidency University in Kolkata . The faculty and academic programmes of the university enjoy a solid reputation.

The following are  top courses at IISER Kolkata:

Biological Sciences BS-MS

Chemical Science BS-MS

Earth Science BS-MS

Mathematical Sciences BS-MS

Physical Science BS-MS

Presidency University in Kolkata might be a suitable option for you if you're thinking about getting a B.Sc. in Physics, Chemistry, Mathematics, Economics, or Geology. However, IISER Kolkata might be a better choice if you're interested in obtaining a B.Sc. (Hons.) degree in the biological, chemical, mathematical, or physical sciences. Therefore based on your interestes you can choose whatever university you want.