B.Sc

I think its around 2 lakhs rupees per year, if you do the same course. But, its a huge amount so there are a number of option in North India, where you can chose the same course in cheap amount. and Balance amount you can invest on camera equipment.
Prerequisites / Eligibility
12th/ High School/ Equiv

I hope this link will help you
https://www.shiksha.com/science/articles/top-10-bsc-msc-colleges-in-india-blogId-13473.

Hi,
I think optometrist is a better choice than B.Sc. Nursing, because now a days normal course is not enough you have to be unique. That will help you succeed. All the best.

You have to go for IELTS and if you crack it then you will be eligible for most of the countries. If you give GRE along with IELTS then you will be eligible for all the countries.

You should qualify in 12th standard or equivalent examination in science stream with physics / chemistry / biology from a recognised university. You should score minimum 60% percentage of marks in 12th board examination. The separate institution may conduct entrance examination within the colleges.

No, the main eligibility for B.Sc agriculture is minimum 55% in +2.

You can check the syllabus for the exam:
https://www.shiksha.com/b-tech/exams/amp/keam/syllabus#referrer=https://www.google.com&_tf=From %1$s

M.Sc biotech will be a good option if you are looking for career in industrial sector with biotech.

There are many Masters courses you can opt after B.Sc in biotech:
M.Sc. Biotechnology
M.Sc Biochemistry
M.Sc Botany
M.Sc Zoology
M.Sc Cell Biology
M.Sc Molecular Biology
M.Sc Bioinformtics
M.Sc Agriculture
M.Sc Food Technology
M.Sc Animal Biotechnology
M.Sc Biophysics
In term of scope you can choose anyone.