After 12th std what are courses available other than engineering so that it becomes useful for ias .

Hello Nakshitha ! You can go for B.A groups which can help you to attain your dream of being ias . But the thing is that if you choose that way, you must go for civils ,it is not that much appreciable than pursuing btech , personally I suggest you to go for engineering of core branches like eee civil ,mechanical and continue your preparation for ias from the first year.
ALL THE BEST UPCOMING IAS OFFICER.

Hi Naksitha !well am Ankit, a Humanities student ,and I also dream to peruse IAS ,so leme suggest you some career options after 12th.You can opt for CLAT (common law admission test ) , qualifying this exam will make you persue Law in NLU's( National law universitie) which would make you seek law ,and after graduation you  can opt for subjects of law in IAS ,else try to do yoir graduation in any subject from any reputed college and start preparing for IAS from your college days and try to opt that subject in college which you aim of opting in  IAS ....best of luck for future!!