Manipal

You are eligible for lateral entry admission in B.Tech aeronautical engineering at Manipal University. The lateral entry program enables candidates with a 3 years diploma in engineering or an equivalent degree to get admitted directly to 2nd Year (3rd semester). Admission is based on Manipal University Online Entrance Test (MU-OET). Admission test is of one hour duration. It consist of Diploma level-mathematics (50), physics (10), chemistry (10) and communication skills in English (20). BSc graduates with Mathematics will have a separate question paper consisting of 70 questions in mathematics and 20 questions in communication skills in English. The MU-OET 2017 will be held between 24.05.2017 to 29.05.2017. Candidates can select the test schedule of their choice in the online test booking system.

Hi Bhupendra,
Among the 3 colleges, you may choose Christ University as your first priority, Amity University at second and Manipal as the least. I am stating it in terms of ROI, fee structure, placement records and infrastructure.
The fee structure of the following institutes are mentioned below:
Amity University: 1.21 Lacs per year.
Christ University: 1.7 Lacs for 3 years.
Manipal University: 1.11 Lacs per year.
3 C program of Amity is a very expensive program and the ROI so far from Amity University has been average. You may go for the course if you wish to study in different continents paying hefty amount of sum. However, you might end up getting an average package like every other guy who's sitting for the placement. I would not recommend you to pursue this course but based on your better research, you can look upon the same and decide. Always understand that getting a placement is in your hand.
I hope it was helpful.
All the best.