Colleges in Guwahati

The fee structure for Indian School of Business Management & Administration, Guwahati - Graduate Diploma in Management is mentioned in the following link. https://www.shiksha.com/college/indian-school-of-business-management-and-administration-gwalior-33886

In Mumbai:
HR College
NM College
Podar College
SIES
These are supposed to be among the top. I have no idea about Guwahati.
Hope this helps.
All the best.

It is in the month of August for most of the colleges in India.

Once she has completed her 12th, she can go for courses like B.A. Drawing and Painting (Hons), B.A. Painting, BFA Painting or for a Diploma of 1 or 2 years.

Hi Kuldeep!
If you have completed 10+2 from a recognized board of education with at least 45% marks, you are eligible to apply for university's entrance test. The online application of the entrance exam will begin in the first week of July.

Yes, you can if you have maths in HSC.

Please check for your eligibility and admission process followed to pursue B.E. in Mechanical Engineering at Assam Engineering College from the criteria mentioned at the link provided below.
https://www.shiksha.com/b-tech/course/b-e-in-mechanical-engineering-assam-engineering-college-guwahati-53449