Norway

Hi Shriya,
Your IELTS score is very low. An overall score of 6.5 is required for any PG level course in the world. But IELTS alone is not going to give you admission. And also depending on how good your profile is this current score may be considered. It is true not just for Germany but also the other two countries you mentioned. Germany is a research hub so it should be your first preference. You must have had very good marks in your Masters, publications, papers, projects, etc. For any Ph.D applicant, relevant paperwork is very important. Knowledge of German language is highly suggested. I will advise you to check options in all these countries, write to the universities and the research heads of the department, rigorous follow up is required. Some high-level recommendation letters are also required to get through the network. Talk to people you know for your LOR. For now start checking with the universities.