The answer highly depends on your preference. If you are aspiring to be a good programmer, you should think of going to IIIT Allahabad. The curriculum is based on a coding point of view as compared to the other colleges you have mentioned.

• You will have a very programming-centric course right from the first year. Most of the students do very well in coding competitions.
• DTU CSE would also be another good option for you but the seats in this branch are quite limited so there is a lot of competition.
• If you are looking at the personality development aspects, it is also quite good. Many people also choose to ignore this parameter, but it is quite important. There are a number of opportunities available with DTU in many sectors as it is located in Delhi.
• MNIT Jaipur would not be as good as the other two options as IIIT Allahabad provides the best options.

But, it is suggested that you go for DTU CSE as many friends of mine have been able to improve quite well as far as their skill set is concerned in their fields of interest. They also received good jobs in reputed MNCs.