B.Sc

Subjects available in Bachelor of Science
1. Biology
2. Biochemistry
3. Botany
4. Chemistry
5. Computer Science
6. Electronics
7. Environmental Science
8. Mathematics
9. Physics
10. Zoology

After B.Sc (PCM) means B.Sc (Bachelor in Science) with physics, chemistry and mathematics.
You have benefit, you can choice any M.Sc stream:
M.Sc (physics), M.Sc (chemistry, M.Sc (mathematics).
You can choice master degree in Science stream as per your interest.
Also, you can choice mathematics stream.

B.Sc(Hotel Management) will be more suitable after 10+2. You can check the details related to the course, duration and eligibility on the website of various universities. Some of the links I can suggest you are www.lpu.in, www.bhu.ac.in, www.jnu.ac.in.

Hi Jay, do you mean BS in Computer Science?
Eligibility criteria will vary slightly with the universities. Mostly good academic grades during 10+2 and strong mathematical foundation is required. A grade above 70% to 75% is recommended for the top universities. Additionally you must take IELTS or TOEFL. A good score generally is 6.5 in IELTS or 100 in TOEFL. You must visit the university websites for IELTS or TOEFL requirements. Hope it helped.

Hi Akash,
Please refer to this link which addresses your query
https://ask.shiksha.com/which-are-the-best-colleges-in-abroad-to-study-masters-in-industrial-chemistry-qna-3757645
Hope this helped.

Hello, some of the best Charles Darwin University,Deakin University ,Victoria University and University of Canberra. I will suggest you check this list for more options
http://www.australianuniversities.com.au/courses/australia/undergraduate/nursing/campus/c/d/ug-nursing/
Regards

You will have to check the cut off list for the same.

You can get admission but you need to check the criteria with your University.