Hello
Here are some of the exams which you can give after your 12th science
MRNAT - Manav Rachna National Aptitude test
JEE Main & Advanced
NATA - National Aptitude test in Architecture
NEET - National eligibility cum entrance test
AIIMS - All India institute of medical science
CLAT -  Common law admission test
AILET-  All India Law entrance test
NIFT - National institute of fashion technology
NID  - national institute of designing
AIEED -All India entrance examination for design
SAT - standardized test used for college admission in US
NCHMCT JEE - National Council of hotel management and catering technology

Hope this helps