I want to prepare for IAS although I have not started college yet. Are 4 years enough for the preparation?

Hi, You need a graduation degree to appear for IAS exams and if you are sure that you want to pursue IAS only, then I think you should go for the course of UPES, which is BA in public policy and administration. This university, along with this graduation degree provides classes for IAS preparation.

1 year is enough if you prepare for it seriously. But I would suggest you to concentrate on your graduation as you must not neglect your graduation while preparing for IAS.