IIIT Delhi is clearly the best choice out of the three options especially if we are talking about CSE. Your preference order should be the following.
IIIT Delhi (Indraprastha) > Thapar University > LNMIIT Jaipur
Cutoff: (IIIT D > Thapar University)
The quality of the students also has an effect on how the college performs and also in its rankings. The cutoff for CSE at IIIT Delhi is around 200-225+. Thapar University admits students with JEE Mains marks more than 170 for students’ outside Punjab and 150 marks for students from Punjab. The cutoff indicates IIIT D offers a better peer group.
Placements:
Thpar has a great coding culture. However, based on student crowd, placements, etc. the best option among the given choices is IIITD.