Hello harshitha

Congratulations for completing bachelor of science second year with good percentage. As you are bit confused about the courses that to be taken by you in third year. Then go through all the subjects and analyze in which field you don't have interest and in which field you are interested and based upon that analysis go through the college and courses. For more information about the colleges and courses go through the below link

https://www.careers360.com/college-predictor

All the best