Hello Sai,

All the branches are good. I would suggest you to go as per your interest & whatever you like as each branch has its own advantage & disadvantage. As you told that you like Mathematics then you can go for Industrial Design, The other options are Thermal (heat transfer, thermal engineering, Refrigeration and air conditioning), Fluids (fluid mechanics, hydraulics), Design stream (CAD/CAM, Finite Element Theory), and Manufacturing and precision engineering.

Good Luck!