Science

Dear friend,
Kindly be more specific about your question.

Ascending order of priorities:
IISc
OLD IITs
NEW IITs / Old NITs
New NITS
Old Central Universities
New Central Universities
State government. Technical Institutes / Universities
New State government. Universities/ Old State universities.

You have to prepare for GRE as most of the students apply for MS after graduation. It is not difficult to get visa of Canada, you can easily apply for the visa of Canada.

Eligibility criteria:
IIT JAM 2018 Subject-wise cut-off is mentioned below. Please check, if you made the cut from the marks mentioned below. In Physics, qualifying marks for general category are 19.51 while for SC/ ST/ PWD, it is 9.76. For Physics Paper/
In Chemistry, qualifying marks for General Category students are 14.79 and 7.39 for SC/ST/PWD. For Chemistry Paper of IIT JAM 2018. In Mathematics, qualifying marks for General Category are 23.35 and 11.68 for SC/ST/PWD. Based on IIT JAM Result 2018, candidates will be admitted to institutes if they fall in above eligibility then you are eligible.
All the best.

Agriculture can be opted by both science and commerce stream. But preferring environmental science, soil study, economic strategy, humanities, etc., humanities will be better.

Your interest is what you need. AIMS can be surely achieved. You can do your degree along with your profession. Browse the colleges offering part-time or correspondence, get details go ahead.

Both have their own merits. Accounts and commerce without mathematics is enough to excel in a career.

A student who has a minimum 50 percentage in 10+2 and has qualified for at least one of JEE Main(paper-2) or NATA is eligible .
All the other course details are here:http://www.cuchd.in/architecture-and-design/bachelors-of-architecture.php.

Why do you want to do your graduation again if you have already done it? It would be a wise choice if you do MA in economics after completing BA in geography if you are interested in economics. If you are in 12th and interested in economics you can directly pursue BA in economics.

All the colleges will accept you as maths is not compulsory for BBA admission. You may refer to the following link for a list of top BBA colleges in India:
https://www.shiksha.com/bba/ranking/top-bba-colleges-in-india/93-2-0-0-0