Could you please guide me on
1) Which is the best country to study masters in project management?
2) Which is the best international college to study masters in project management?
3) where can I get all information for the above?

I’m looking at the same thing. The best bet is to ONLY get a degree from a PMI certified program. http://www.pmi.org/CareerDevelopment/Pages/NA.aspx

I don’t know if there’s a specific country that’s best, but I’d say perhaps you can go to a school that’s more closely linked to an internationally-recognized school or area. Financial Times and US News both rank business school programs.