Bsc(maths hons.) or btech(cs) if preparing for IAS exams ?

What should i do bsc(maths hons.) or btech(cs) if i have to prepare for ias exams???

This should not be a very hard question. If you are focusing on IAS then you should not touch Btech , it is because Btech requires lot more attention than BSc .

What subject you are going to opt for IAS ?

One of the subjects which i have choosen is maths..
I'm very much confused regarding which subjects to choose and which course to do..
Pls suggest me..

If you ask anyone who is already preparing for IAS then you can get the right answers, however, I know about it as my friends are preparing these exams. If you are exceptionally good at Maths and similar subjects then take it, on the other hand generally I find people going for subjects like History etc as they are easy to prepare as compared to maths and science.

Consult someone who is already preparing and they will tell you best.