Hello trith, you can opt for the the computer science stream as it has a lot of scope in future and knowing the networking of computer.. also it has a professional jobs too.. you can do B.Tech from CSE.. Cse is in good demand for now.. CSE includes jobs like software developer, software engineering ... 

all the best!! 

Dear Tirth first of all congratulation for getting very good percentage in 10+2. The dear first thing is you have to take stream as per your interest and we can't choose on the basis of demand in the market because of your whole future professional depend upon on which stream you belong.

All stream is like computer science, civil, mechanical, IT etc and all branch have own specialities.

If we talk about demand Computer science is most demanding stream because it has lots of inner streams which grow very fast like Data science, artificial engineering, machine learning.

So dear try to find out your interest and get little bits knowledge about each branch it will help you to decide your stream.

All the best for further clarification mention your comment.