I assume that you haven’t decided on a specific branch and hence you have multiple options open from different institutes and branches. Before I give you my suggestion it’s important to know that most non-CS students at IIT Bombay and IIT Kharagpur try to get a job in CS only. For this, they learn programming and sit for non-core placements.
For the same reason, I am recommending you join either BHU or Guwahati (CSE).
In the end unless you are a North-Eastern, BHU is the best option for you. Either way you are good to go and thus can make a decision that suits your location.