which branch in s best civil or IC

Instrumentation basically comes under the bracket of Mechanical Engineering. It has a hand in glove relationship with Chemical Engineering. Instrumentation engineers find work in Process industries (Refineries, Fertilizers, Paper, Power plant, Food processing, chemical etc), Process Automation (Emerson), Factory Automation (Hyundai). The scope is also there in other fields also like Avionics (Measurement and Stability), Automobile, Electronics, Biomedical etc.

Civil engineering: It is a profession which has helped in building and transcending knowledge as how to build and create physical environment and make this world a better and convenient place to live. Civil engineering as a profession has explored the idea which aided us in leading a quality life. Thus, if you have an idea that can help to make this world a better place to live, then a career in civil engineering can be a possible choice for you.

You can check the scope for both below:

Civil Engineering

IC Branch

Hope this helps.

Good luck.