CBSE 10th

Foreign universities have their own admission process. Your scores are decent. Shortlist few colleges in Germany. Checkout their course and syllabus. Select few colleges where you would like to apply. Prepare for the entrance exams which they consider. Do well in exam. Proceed with admission process. Every college will have a different criteria for admission. You need to check it on their website. All the best.

D.Ed: Eligibility
Listed below are the minimum criteria which candidates interested in pursuing the course are required to fulfil, in order to be eligible to apply for the course. Successful qualification of class XII from a recognized educational Board. Preferably, Humanities subjects as the main subjects of study at the 10+2 level, and a minimum aggregate score of 50% (45% for SC/ST/OBC candidates). The minimum age limit is 18 years and upper age limit is 36 years. It is relaxed by three years for OBC and five years for SC/ST candidates.

Yes, you are eligible. Also, you need to have 90%tile in CAT.

It is good that you have set a goal and have started to think of how to achieve it from now. If you are going to do class 11 and 12 from CBSE then I think you should take up humanities (if you are very much sure that you will not change your mind later on) as you will have an opportunity developed as base in social science. Then you can do BA and take coaching for UPSC simultaneously so that you might not have to take a drop.
Also, try to make notes of editorial column of the newspaper daily and try to think of the topic in different view i.e. how can it effect socially, economically, etc.

Hello!
JBIMS, Sydenham, Somaiya, Welingkar, etc are some renowned colleges which do not consider ones 10th and 12th marks for admissions to its MMS programme.

Hello,
After completing class 10th, he can apply for Science Stream and after completing class 12th Science, he can go for health Science courses by applying NEET & CET exams.

Unfortunately, due to the time gap, you cannot pursue 2nd PUC.

For admission in any Diploma, you have to passed 12th exam. Because 90% institutes takes admission on the minimum educational qualification 12th.