There are many colleges in India where u can take admission in B.Sc . Entrance exams are all specific to college and location. It depends on where u want to take admission and what are the eligibility criteria to take admission in those colleges. 

https://www.google.co.in/search?q=best+colleges+for+bsc+in+india&oq=bes&aqs=chrome.1.69i57j35i39j69i60j35i39j0.1732j0j7&client=ms-android-huaqin&sourceid=chrome-mobile&ie=UTF-8 

Hello,
There many colleges in india that gives admissions in bsc courses to candidates like DU,VIT,CU....you can check out their websites and can know their admission criteria. For more details you can visit the below given link :
https://www.google.co.in/amp/s/www.yosearch.net/category/bsc-admission/amp/