Hello Cyril,

Any course from any college of Delhi University is good. You should be choosing your course according to your interests. It will totally depend on you that how you make the best out of it.

St.Stephens being one of the premier institutions among D.U. colleges will just provide you a platform to groom yourself and make the best out of your three years of your graduation.

They will not guarantee you success, it will be you who will have to work hard.

Well, If you are pursuing any course from St. Stephens College, you have lots of chances of making it to the foreign universities. St Stephens has tie-ups with foreign Universities like Oxford and Brown etc. You need not worry. 

Just prepare for GRE and TOEFL/IELTS. But I would like to advise you to go for Honours courses rather than Programme because most universities abroad need you to have a specialization in a specific subject in UG.

Good luck!