Hi Bhuvana, 

You raised a good question. Picking the right country to pursue MBA, is based on a few things like:

1) your budget, 2) quality education, 3) your qualification and percentage 4) your goals

Singapore, being close to India and still offering an international experience in the class, make it a popular choice for cost-conscious MBA students from India. Singapore gives an excellent exposure about International Economic scenario and a student who undergoes an MBA gets excellent exposure to world markets.

If it is only studies that you are considering, it depends on the institute you are aiming for rather than the country. These countries have some of the top business schools in the world. Again, it depends what kind of business schools are you targeting. In terms of cost, all these countries are equally expensive though Singapore is known to be one of the most expensive destinations in the world.

To tackle the expense problem, Canada offers some really good options at a cost lower than Singapore.

Rotman, UBC, Alberta are some of the most well known business schools in Canada and the world. In singapore, there are highly acclaimed universities like NUS and NTU. However, the screening process of these institutes are very tough. You could also try applying at some of the business school branches at Singapore like Curtin from Australia, Newcastle etc.

Canada offers MBA students with work permits, ranging from 1-3 years. In Singapore, it's 2 years you get to work after an MBA. 

Finally, you must compute the ROI (Return on Investment) both in terms of the financial and non-financial commitments and returns.