Distance

Hello Ravindra,
Yes, check for IGNOU, U18, MGU, KSOU etc.

After completing B.Com, you can pursue an MBA in marketing, retail management, finance, human resource management, IT, banking, insurance, logistics and supply chain management, international business and operations management.
You can also opt for a professional course like CA. The Institute of Chartered Accountants of India regulates the profession of chartered accountants. The course involves professional competence course, articled/ audit training, information technology training and final examination.
You can also pursue ICWA or company secretary course. You can go for Masters in finance and control or M.Com.

No, you need a graduation degree from a recognised university to start any form of MBA.

Hi Naveen,
This is a decision you must take depending on your career interests. Since you have so many years of work experience, kindly, decide what you want to do next and may be share your plans for better guidance. Visit university's websites for related programs and see what interests you. You will be the best person to know what is best for you.

Hi,
You can refer this link for colleges in Kolkata offering SCM course:
https://retail.shiksha.com/supply-chain-management-courses-in-kolkata-categorypage-11-45-1-0-0-130-127-2-0-none-1-0
Here is the link for IIMM : https://www.shiksha.com/Iimm-Indian-Institute-Of-Materials-Management-Bangalore-institute-college-listingoverviewtab-33356

Hi,
Refer the below link for top colleges to pursue architecture course through correspondence:
https://engineering.shiksha.com/architecture-colleges-in-india-categorypage-2-60-1-0-0-1-1-2-none-1-0

GMAT is not necessary for Distance mode MBA.
Symbiosis, Welingkar, IGNOU, NMIMS, Amity and SMU are the best colleges for distance education and well-designed curriculum.