UK

Dear Raj,
Beware, we don't call it B.Tech. In UK we call it either B.Eng or BE or simply Bachelor of engineering. Imperial College London, Manchester University, Warwick University, Cranfield University, University of Edinburgh, Herriot Watt University, Universities of Oxford and Cambridge are some of the best.

Hi,
Typically, IELTS general is required. You may check UK immigration website for more information.

Hi,
Scholarships are on merit basis, qualifying BMAT will not essentially mean you will get scholarships. You must additionally have excellent academic grades. Please also check with UCL and Imperial College, you will find scholarship information on their website.

For MBA in US and UK, you must have to give GMAT entrance exam that is after the graduation.

There is an out cry against outsourcing and cheaper immigration labor issues in western countries because of which nowadays it is tough to get a job in UK and other developed western countries after MBA as graduates may face work visa challenges.

Hi,
You can take your IELTS and apply through UCAS to study in UK. If you have excellent grades you can apply to good universities in UK. You have to check university's websites for specific entry requirements.
Germany on the other hand requires 13 years education hence you cannot apply directly after 12th. Applicants from India typically enroll into a Bachelor's degree in India and complete their first year making them eligible. You can also apply by clearing the IIT JEE Advanced after your 12th. Read more here:
http://www.daaddelhi.org/en/15064/index.html

It is very difficult to compare between US and UK. If you are planning to settle down then UK is a tough option as they don't give work permits to international graduates so easily. You can narrow down your choice based on your budget, career plans and university requirements.

Hi,
For UK salaries you have posted a query earlier:
https://ask.shiksha.com/what-is-the-average-salary-package-for-radiology-technician-in-uk-qna-4011122
For India check here:
http://www.indiaeducation.net/careercenter/medical/radiography/