I have completed my ITI; now I want to take admission in diploma. Am I eligible?And which country is best for me?Canada, Australia or UK?

With your ITI qualification, you are certainly eligible to apply for diploma courses abroad. Each of the countries you mentioned - Canada, Australia, and the UK - offers unique advantages. Canada is known for its affordable education and friendly immigration policies. Australia, with its strong vocational education system, is ideal for hands-on, practical learning, and it also offers a pleasant climate and diverse culture. 

The UK, on the other hand, is renowned for its prestigious educational institutions and strong research focus. The best choice depends on your specific academic interests, career objectives, and personal preferences in terms of lifestyle and cultural experiences. I would recommend evaluating the course content, university rankings, and potential career opportunities in each country to make an informed decision.