Hey!There

After completing 12th,you can go for engineering,BSc(Bachelor of Science),B.A(Bachelor of Arts)etc.Under these stream lot of courses are available you can go with your interest.If you are interested in pursuing technical then you can go for engineering i.e Btech which is 4 years technical course.And if you want do hons with Science then you can go with B.Sc in which you won't able to explore yourself and also you won't get Soo much career opportunities in comparison to engineering.If you want leave Science stream then you go for Bachelor of Arts or B.Com..

Ask if any query..

There's a lot of opportunities in front of you after you complete 10+2 with science stream. If you had mathematics, physics, chemistry as main subjects, and have got atleast 75% in +2, then you can appear for JEE MAIN. You can also appear for state level entrance exmas. If you had physics, chemistry, biology or biotechnology as main subjects, then you can appear for NEET. If you are interested in architecture, you can sit for various architecture entrance exams like NATA if you match their eligibility criteria.
You have other options like B.Sc, BS, BCA, B.A., B.Com in any disciplines. You can go for integrated course also.