B.Sc

You can check for the eligibility criteria on their website may be. That'll help you better.

Hello,
As far as B.Sc course is concerned, Sastra offers it's best faculty and research areas. You have scholars who are working for past 3 decades. Physics is best option, as far as my concern, if you are interested in that, please choose Sastra University. Visit SASTRA. Edu for further details.

Computer Science honors is a good course, if you are a good programmer and pursue this from Delhi University you may get chance to work in Google companies too as software programmer. But, it will depend on your coding knowledge.

There is no entrance test for B.Sc Maths. The admission process is merit based. You must have scored 60% in 10+2 with Maths as a subject.

Top B.Sc. Computer Science (B.Sc. CS) Colleges in Dehradun are mentioned below:
1) Greenway Institute of Management Studies, Dehradun
2) Modern Institute of Technology, Rishikesh
3) DIT University, Dehradun
Regards.

No there is entrance exam. The admission is on merit basis.

Top 10 colleges for photography courses in India are mentioned at the link provided below. Earlier, one had to learn the nuances of photography on job or may be by working as a helper with bigger photographers. However, now one can easily secure the necessary skills at good colleges. Some of the best colleges offering photography courses are mentioned at the link provided below:
https://www.shiksha.com/arts-fine-visual-performing/photography/articles/top-10-colleges-for-photography-courses-in-india-blogId-11445.

Please check for your eligibility to appear for Orissa University of Agriculture & Technology Entrance Exam 2018 ( OUAT Entrance Exam ) from the criteria mentioned at the link provided below:
https://www.shiksha.com/science/exams/ouat-entrance-exam.

Please refer to the link provided below for details regarding B.Sc in Yoga from AISECT University, Jharkhand. You should be able to download college brochure which contains important details regarding fee structures for this particular course. Regards.
https://www.shiksha.com/beauty-fitness/yoga/course/diploma-in-yoga-aisect-university-bhopal-282114