Science

If you love biology then you can go for bio as your subject in 12th and pursue your career in medical. B.Pharma, B.Sc. Zoology, etc. If you love computer science then have your subjects in 12th as computer and maths then you can pursue your career in IT field doing B.Tech or BCA.

Yes, to get admission in B.Com in Delhi University you must pass your 10+2 with mathematics. It is mandatory.

Yes, you can choose B.Pharma for further studies.

Any person who has successfully completed his or her 10+2 with physics, chemistry and mathematics with minimum 50% marks is eligible to pursue this course. So you don't need to write JEE.

Hi Swapna,
It can be regarded as a combination of science and psychology. Consider reading this article:
https://paranormal.lovetoknow.com/How_to_Become_a_Paranormal_Investigator

You can consider following colleges:
1. DAVPGC-D A V Post Graduate College
2. AMSD-Academy of Management Studies Dehradun
3. DAVPGC-Dayanand Anglo Vedic Post Graduation College
4. BCMT-Beehive College of Management and Technology
5. SGRRPGC-Shri Guru Ram Rai PG College Dehradun

To get admission in German universities first you have to qualify their entrance exam. As your degree should be of 60 percentage or above, you can get admission very easily after qualifying the entrance exam.

https://www.google.com/amp/s/www.shiksha.com/science/articles/amp/job-options-after-bsc-degree-know-salary-packages-blogId-13469
I hope the link aids your query.