My JEE Advanced rank is 1402. What is better: IIT KGP MNC (MSc), IIT Indore, CSE or Guwahati MNC?

I feel the best option for you is IIT Indore CSE. The curriculum of MnC is pretty rigorous and rigid whereas in CS you have a plethora of domains to pursue your career in. Moreover, there isn’t any difference in the number and quality of companies visiting IIT KGP and IIT Indore now. New IITs like IIT Hyderabad and IIT Indore are doing better than some old IITs so you won’t regret choosing them over older ones. 

IIT Indore functions from its permanent campus so you won’t be sacrificing the quality of campus life even. 

Don’t choose IIT KGP or IIT Guwahati just because they have higher cutoffs. Rather prioritize the branches. That being said, CSE is the most demanded branch while MnC is math-intensive with less focus on the programming part and more focus on theoretical mathematics. 

Ultimately let your interests make the decision and not the brand name. As far as brand name is concerned IIT KGP might be slightly better only because of its alumni network. Again, your branch preference matters more.