Hi

By science field I am guessing you are asking about BSc

List some of the top colleges for BSc is provided below :-

---------------) St Stephens College, Delhi

---------------) Hindu College, University of Delhi

---------------) Miranda House

---------------) BHU

---------------) Loyola College

---------------) Jain University - [JU]

---------------) Madras Christian College - [MCC]

---------------) Hansraj College - [HRC]

---------------) Presidency College

---------------) Kalinga University

---------------) Fergusson College

---------------) CT University - [CTU]

---------------) St. Xavier's College - [SXC], Kolkata

---------------) Ramakrishna Mission Vivekananda Centenary College Rahara

---------------) Kirori Mal College - [KMC]

---------------) St. Xavier's College, Mumbai

---------------) Ramjas College

---------------) Ramakrishna Mission Vidyamandira

---------------) Sri Venkateswara College - Delhi

---------------) Stella Maris College

---------------) Atma Ram Sanatan Dharma College

---------------) Ramakrishna Mission Residential College - [RKMRC]

---------------) Deen Dayal Upadhyaya College

---------------) PSG College of Arts and Science

---------------) Mount Carmel College - [MCC]

---------------) Dyal Singh College - [DSC]

---------------) Christ University

---------------) Gargi College

---------------) Trivandrum University College

---------------) D.G. Ruparel College of Arts Science and Commerce

---------------) St Joseph's College - [SJC]

---------------) Sri Guru Tegh Bahadur Khalsa College - [SGTB]

---------------) Ramnarain Ruia Autonomous College

---------------) St Xavier's College, Gujarat

---------------) Jamia Millia Islamia University-[JMI]

---------------) Acharya Narendra Dev College - [ANDC]

---------------) Daulat Ram College - [DRC]

---------------) Jai Hind College - [JHC]

---------------) Kishinchand Chellaram College - [KC College]

---------------) Shyam Lal College - [SLC]

---------------) St. Aloysius College

---------------) Andhra Loyola College - [ALC]

You can get the complete list of BSc colleges by going through the link provided below :-

https://university.careers360.com/colleges/list-of-bsc-degree-colleges-in-india

>>>>>>>>> Admission process

In general, admission in BSc is on the basis of marks obtained by you in your class 12th board examination but yes there are some college universities which conduct  entrance examination for providing admission.

For example ,

BHU offers admission in BSc etc through its own entrance examination called BHU UET.

Some of the top entrance examination for BSC is provided below:-

--------) Banaras Hindu University Undergraduate Entrance Test (UET)

--------) Allahabad University Undergraduate Admission Test (UGAT)

--------) Central Universities Common Entrance Test (CUCET)

--------) ICAR - AIEEA UG for admission in bsc agriculture, fishery etc

--------) TIFR GS :- for admission in BSc course offered by Tata Institute of Fundamental Research

--------) IISER Aptitude Test - for  admission in 5 year integrated course

--------) AMU Entrance Examination for  B.Sc

--------) GGSIPU CET

For more details checkout:- https://www.careers360.com/courses/b-sc-bachelor-of-science

Thank you