I will suggest you to take Mechanical, if you are not quite sure of excellence in coding. Coding and Software Development are fundamentals of any CS Engineer, be it in fields of Technical Architecture or Web and Software Development.

Core Prospects of Mechanical

Research Organizations : BARC ISRO DRDO

Operations Industries : ITC Reliance Unilever etc.

Mechanical Plants : Tata Steel Tata Motors TVS etc.

Digital/Technological Prospects in Mechanical

Artificial Intelligence and ML in Operations

Computer Integrated Manufacturing

Automation and Self Driving Cars

Robotics and UAVs.