Engineer

Hello Asif Raza,
It depends on you, but I will suggest you should opt for mechanical engineering because it is an evergreen field. Aeronautical also has a good scope, but it doesn't have much demand as compared to mechanical engineering. Mechanical engineering has more scope for future. In future, you can move opt for Masters in aeronautical engineering.

You need to work hard. Qualify JEE Mains and Advanced exam to pursue B.Tech in IIT or NIT.

Good option, it is based on total industrial applications, designing of pipes, etc. According to me, you should opt for chemical engineering. After completing you chemical engineering you can work as a process engineer, piping engineer, technical engineer, production engineer, etc.

USA is the best option for you, you can also choose Germany. These two countries are the best for mechanical engineers. They provide quality education with excellent job prospect. Canada is not a bad option, but it should be your last option.
All the best.

You can refer to the links mentioned below:
http://www.payscale.com/research/IN/Job=Aeronautical_Engineer/Salary
http://www.payscale.com/research/IN/Job=Mechanical_Engineer/Salary

Hello,
Yes, you can get a government job after completing your engineering.
You can get a job in banking Field or in Indian Railways.
There are too many posts available for engineers.
You can apply for Railway RRB JE & SSE Exams or IBPS Bank Exams.
Click here for railway exams preparation - http://entranceexaminformation.blogspot.com/2016/06/railway-rrb-exams-are-you-prepared-for.html
I hope it will help you.
Best of luck.

You may refer to following link for information of all engineering entrance examinations: https://www.shiksha.com/engineering/exam