I am confuse about my career. What I should select medical or engineering ? I am good in maths as well as biology. Which field as much scope
You should choose the field according to your interest.
If you want to become a doctor you can go for MBBS and if you are interested in technology you can go for B.tech.

Engineerig-
4 years of engineering can get you a yearly package of 4 to 5 laks. If you want to do MBA after that you can get a package around 12 to 45 lacs.
Medical-
After 5 years of MBBS you can get a job and start your practice. You can also go for specialization to earn 5 to 6 lacs. You can make big money if you have your own clinic and hospital.