Canada

Hi Gagan,
After completing the Diploma, you have the option to complete Bachelor of dental sciences at UBC and a Bachelor of health sciences from TRU. To start looking for jobs, you must acquire a license first, to be eligible for registration and licensure with the College of Dental Hygienists of British Columbia.
Graduates must pass the national dental hygiene certification examination. It is better, if you obtain a Bachelor's degree for better job prospects and later think of a PG level qualification. Please note that programs intake is under review. So, contact the college directly before applying.

There are many colleges in Ontario that provide tourism courses.
You can check the below mentioned link:
http://www.ontariocolleges.ca/SearchResults/CULINARY-HOSPITALITY-RECREATION-TOURISM-TOURISM-TRAVEL/_/N-lqh5

Can you mention your area of interest? There are no generic best courses, it all depends on your preference and choice.

Can you mention the Diploma level? Do you mean undergraduate Diploma or post graduate Diploma?
You need to have at least 60% to pursue a Diploma in Canada. Plus you need to have scored 6 overall bands for undergraduate course and 6.5 overall bands for post-graduate courses.

Can you mention the name of the undergraduate degree and the exact specialization?

The college is good, but how you will perform and score in the course depends completely on your efforts. So, if you are great in web and mobile app developing skills, then the college will provide you with all the necessary help.

Hello Amaljith,
Yes, MBA students can do any part time job in Canada, if the employer allows you to work.

No, for Canada 1 year gap is accepted. Your academic performance is excellent and you have scored good bands. You will surely get study visa.

Australia and Canada are the best option as they are the emerging developed economies and they need professional in this field.

Yes, you can go for an MBA abroad. The average age of every MBA classroom in universities abroad is usually on the higher side. The reason being foreign universities prefer students with more than 5 years of work experience. So, if you have enough work experience, you can easily get accepted to an MBA course.