I have 12800 rank jee mains 2019 . I want admission in Delhi . Which subject & / or college will be best for btech in engineer. CS prefer

Then Which r best colleges on this rank for C's please guide

Dear candidate, I apologize for the late reply.According to me, a good college for Computer Science would be one which has a good infrastructure, has some locational advantage and most importantly has a great coding culture. Keeping all this in mind I will suggest you following colleges (assuming you are from general category and appyling Other State/All India quora wherever applicable). Also many times the Information Technology branch of a college is equivalent if not better than Computer Science but people just go by name and do not see the course curriculum and placements which are quite similar to CS. So according to this, your preferred colleges should be:NIT Hamirpur (CSE)IIIT Gwalior (CSE)NIT Jamshedpur (CSE)NIT Raipur (CSE)NIT Durgapur (IT)IIIT Jabalpur (CSE)Hope you make the right decision! All the best  

Thanks for your decent reply . Whether cs/it/cs with maths / se are caparatively same or different while placement . What are the drawbacks of them. Can you please explain . Thanks in advance

I have never seen that any company which recruits CSE students has ever prohibited any IT branch student from their placement. CS with mathematics is considered as one of the brilliant combinations which even improve your placement scenario.
So choosing a good college is way more important to have the proper exposure, alumni network and coding culture because ultimately that will decide your placements. That is why well established colleges must be prefered.