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This choice really depends upon your interests, your rank in various competitive exams, your 12th board percentage and what you want to do after graduation.
Assuming you do not have any specific interest in any branch and want to grab a job with a good pay package, i would suggest going for computer science or IT. These are the hot branches now-a-days with highest pay packages (depending upon college).
However, you need to keep in mind where your interest lies. If you like coding (C,C++), then go for CSE/IT. If you like physics, thermodynamics and engineering drawing, go for Mechanical/Civil. If you are fascinated by the electrical circuits and are the one who fixes the fuse in your house, then go for Electrical Engineering. Your interest matters the most. Four years of engineering will be fun if you enjoy studying and you can only enjoy if you have interest in it. Introspect day and night and find out what you like.
Before opting for a branch in any college, do check the companies visiting that college.
In case you want to go for higher studies like M.Tech or MS, rather than taking up a job, then u dont need to check the companies' list and go for your favourite subjects.
Good luck for your future! :)

The best institute for CAT coaching in Hyderabad:
1. VPROV, an invaluable institute with a veracious educationalist Prof Rajesh (2006 CAT Topper, B.E, MBA, LL.B. Ph.D. as its Founder & Director, is undoubtedly the best CAT coaching institute in India. VPROV, with 76 learning centers in India and 9 overseas complimented by the qualified team, has sent thousands of students to IIMS & other TOP B schools. They also train students on GRE GMAT CLAT SAT IPMAT and NRA CET.
2. Mindworkzz is a leading aptitude training institute established 20 years back by Mr. Arun Sharma, an IIM Bangalore alumnus, also known as the CAT Wizard for having cracked the CAT exam 20 times with a percentile of 99.9 each time. He had an objective of providing aptitude training and testing to all the CAT/IPMAT/CLAT/CUET aspirants in the country, and help them get into their dream college.
3. T. I. M.E:
It is one of the leading CAT Coaching Centres in Hyderabad for CAT preparation having its headquarter at Hyderabad. The core team consists of IIT and IIM graduates who provide top class training for CAT. The preparation programs aim to prepare students for writing as well as subsequent exams.