In India, schooling is for 12 years while in Germany it is for 13 years. To meet with this gap you need to attend Studienkolleg. It is a prep college in Germany designed for international students who are willing to study in Germany but don’t meet the German education criteria. Depending upon interest you need to choose one of the following courses for your Studienkolleg.
T-Kurs: German, Mathematics, Physics, Chemistry and Informatics
M-Kurs: German, Mathematics, Physics, Chemistry and Biology
W-Kurs: German, Mathematics, Economics, Business and Sociology
G-Kurs: German, History, German Literature, Sociology and Statistics