M.Com

Hi Dharmesh!
The selection procedure varies from college to college. Most college will consider your marks in Graduation, I.e, the selection will be merit based. Some colleges have also started taking an entrance test of 200 marks. The exam will be divided into 5 units: Economics, Accounting, Business Standard and Mathematics, Business organisation and Management and General Knowledge and Current Affairs. You can refer to college's website that you are interested to take admission in and know their own criteria.

APSET is eligibility test for Andhra Pradesh. If you belong to the state, go ahead.

Hi Hema!
These are the few good colleges in Chennai for pursuing M.Com:
1. Loyola College
2. Madras Christian College
3. Stella Maris College
4. Presidency College
These are the elective papers in M.Com that you can opt as your specialisation:
Banking & Finance
Commercial Bank Management
Entrepreneurial Management
Financial Bank Management
Financial Markets
Human Resource Management
International Finance
Investment Management
Research Methodology in Commerce.

Your eligibility depends on your credibility. There are two ways to get admission. Direct way or by passing the entrance exam. It takes a high rank to get a seat in SRCC (top 20, as I've heard). You can get more details by looking at their official site. Here's the link http://www.commercedu.com/mcom/

You can go for maths subjects in B.Ed if you have command over the same along with commerce subjects.

Hi Kannu!
Delhi University and IGNOU are the best two distance learning options if you are specifically looking to apply in Delhi based institutes only. Also, you should know that you can apply to any distance education institute in India to pursue the course since all good universities have their study centers in most states.

Yes, you can opt for maths and economics as a subject in B.Ed.