B.Sc Botany

Please refer to the link provided below for a detailed list of colleges which offer courses of higher studies in B.Sc agriculture in India. You should be able to download their brochures which contains details regarding entrance exams conducted by the authorities in a particular institution.
https://www.shiksha.com/science/colleges/m-sc-agriculture-colleges-india

The OUAT consists of questions from Maths, Physics, chemistry and bIology. Please refer to the link provided below for details regarding exam pattern and marks distribution for different subjects. You should plan to prepare for your exams accordingly, and study subjects which you are strong in, and also improve on subjects in which you think your concepts are not that clear. Make a proper time table and eat, sleep and follow healthy habits during your preparation.
https://www.shiksha.com/science/exams/ouat-entrance-exam/pattern

Hi Neeraj. Eligibility for NASA Exam are given below:
Qualification:
Candidate should have Bachelor's degree from an accredited institution in engineering, biological science,
Physical science or mathematic and should have good academic records.
Candidate should have ability to pass the NASA long-duration space flight physical.
Specific requirements:
Distant and near visual acuity:
Must be correctable t20/20, each eye
Blood pressure not exceed 140/90
Standing height between 62 and 75 inches

PG Courses After B.Sc
B.Sc graduates have a wide variety of options available in terms of topics, subjects, & field . They have an option to pursue a post graduation degree in their respective field. Students can also join non-science master degree courses such as animation, management, journalism, computer technology, etc after the completion of B.Sc degree.

Hello Ritesh,
The method you are applying is not correct, perhaps you should first have a clarity over the kind of job you want, remember no course comes with a job or with a PR guarantee, so it is best that you first know your career plans and act accordingly. New Zealand is a great place for your field of study, visit university websites for courses they offer, check out which one is closely related to your interest and proceed.