Canada

You should require more than 65% marks to pursue MBA from Canada.

Hi Sumit Sharma,
This will depend on what you mean by bright future. Every person has his own ambition. Find out yours and decide what to study. Check your education background and look for relevant programs. You have just mentioned that you are in class 12th, from this it can't be inferred which stream you are in and what your interests are for any suggestions either.

Hi Diksha,
You can apply for PG Diploma courses in colleges under SPP. Some colleges include Durham , George Brown, Humber College etc. MS programs will be extremely difficult after 3 year degree.

Getting Visa from any country depends upon the purpose of your visit to that country. Tourist & Medical Visa, you can get almost immediately. Job visa takes time. Student visa requires a letter from the institution you are going to study.