One of my friends studied at LNMIIT, so I might be able to provide you some information about it.

CS at Thapar is combined with other courses, some of which are worthy while others are not. You have to choose the course which you are interested in. Depending on that you can opt for the college, be it Thapar or LNMIIT.

The infrastructure and facilities at LNMIIT are really good. Faculty members are enthusiastic about both academics and extracurriculars. They will guide you through every step. LNMIIT has a great coding culture. Also, you will have cooperative seniors.

I am not well aware of Thapar, I can only say that the campus and course curriculum is more or less similar to LNMIIT, unlike Nirma which can be a bit different. So finally I will suggest you go for LNMIIT. Make Thapar your second choice as the quality of the branch varies. Lastly opt for Nirma if both do not work out.

Nirma University, Amrut Mody University situated in Ahmedabad, and OP Jindal University situated in Chhattisgarh all three are famous Indian colleges for Integrated BBA. But, one thing to be noted here is that Nirma University has only integrated the BBA+MBA course available of a 5-year classroom program. Whereas OP Jindal and Amrut Mody University have an integrated BBA course of the 3-year classroom program. More information is mentioned below.

Placements:

Nirma University

• The placement rate for last year batch was 94% of the total batch placed. 
• The maximum package offered was 19 LPA whereas the average package offered was 9 LPA. 
• Top recruiters include Ashok Leyland, Axis Bank, Bajaj Auto, Care Ratings, CITI Bank, Daimler, DCB, Deutsche Bank, Federal Bank.

OP Jindal

• The placements for OP Jindal took a high raise in terms of placements since last year. 85% of total students were placed from campus recruitment. 
• The highest package bagged was 7 LPA and the average package offered was 4.8 LPA. 
• The prime recruiters were HCL, IBM, ICICI, IMS, Infosys, Jindal Steel, KPMG, Mahindra and Mahindra, Mind Tree, Motif.

Amrut Mody University 

• Although, Amrut Mody University has not mentioned their placements statistics for BBA on their official website, according to student reviews, the highest package received by a student was 6.50 LPA and a median package of 3.60 was offered. 
• The main recruiters are claimed to be Axis Bank, Berger Paints, Emam, Evosys, ICICI Securities, ITC, Kotak Insurance.

It can be said that all of the three colleges are almost equivalent in terms of their NIRF ranking and academic quality. Although, as far as placements are concerned, Nirma University has a bit of advantage above the other two. Now one can decide according to the personal preference.

Nirma University is a reputed institution, they are said to develop students both academically and holistically. Some of the notable alumni of Nirma University who reached great heights are: 

• Karan Kurani (2010) : Co Founder/CTO at DoctorC.
• Pranav Mistry (2003) : CEO of STAR lab.
• Minal Rohit (1999) : Indian Scientist, Systems engineer at ISRO.
• Nisha Ganpathy (2009) : Group Product Manager at Dabur International Ltd.
• Rishita Anubhai (2011) : AWS Deep Learning - Sr. Applied Scientist at Amazon.
• Nirmit Parikh (2009) : Founder and CEO of Apna.
• Priyank Desai (2009) : Strategic Account Manager at Amazon Web Services (AWS).