Hey Lakshmi!

Yes ,you can switch your stream from science to humanities in graduation.

BA hons. sociology or BA Sociology is a three - year undergraduation course in sociology.

Know more about the course here -

https://www.careers360.com/courses/b-a-bachelor-of-arts

BA in sociology is an excellent course.Go for it if your interest lies in it.

You haven't mentioned you want admission through merit based or entrance based.

70% in 12th is not a great score.So getting admission through merit - based is quite tough but not impossible.Still,I would suggest you to apply for universities and colleges for both admission- merit based and entrance based.

You can't do much with merit based but entrance exams are game changer.

Prepare well for your entrance exams and you will surely get a seat in BA Sociology.

Refer to this to get to know more about colleges and universities and their ranking for BA Sociology-

https://university.careers360.com/colleges/list-of-ba(hons)-in-sociology-degree-colleges-in-india



Feel free to ask if you have any more queries.

All the best!