Science

Hi Prerana,
If she is planning to study medicine in Canada then she has to do a BS and then she must take the MCAT and enter a medical school for medical studies. For BS in Canada, she will need good academic grades, 75% is the minimum requirement by most universities, she must also take the IELTS to meet the English language requirement.

Yes, you can take admission in B.Sc.
You can take admission in any of the course which is available for 10+2 students. But I would suggest you to join B.Tech after Diploma as it is the best field after pursuing Diploma. Moreover, you can directly join B.Tech 2nd year through lateral entry scheme on the basis of Diploma.

Yes ICAR and IIT-Kharagpur provide this course and takes admission through JEE Mains and Advanced.

If you are interested in creative fields then get into animation or designing.

The eligibility criteria for getting admission in B.Tech. (Aerospace Engineering) course in most of the institutes is as follows:
Candidate should have passed Higher & Senior Secondary level (10th & 12th).
Candidate should have secured 60% in Physics, Chemistry & Mathematics at Senior Secondary level.
Engineering is next to impossible without maths, and most engineering courses need mathematics as a primary subject, at least in the initial years.

Please refer to the link provided below for a list of colleges which offer courses in M.Sc. chemistry in Kolkata.
You can use the filters on the web page to navigate to a college of your choice. Additionally, you can also download their brochure which contains important information like course eligibility, admission process followed, fee structures, placement information etc.
https://www.shiksha.com/science/colleges/m-sc-chemistry-colleges-kolkata

Please refer to the link provided below for a list of colleges which offer courses in M.Sc. chemistry. You should be able to navigate to a college of your choice using the filters on the web page. Additionally, you can download their brochure which contains important information like course eligibility, admission process, application dates, forms, placement information, fee structures etc.
https://www.shiksha.com/science/colleges/b-sc-chemistry-colleges-maharashtra