Computer Science and Engineering

Hi,
You can go for these colleges:
Indian Institute of Technology Kanpur, Indian Institute of Technology Varanasi, Motilal Nehru National Institute of Technology Allahabad, Zakir Hussain College of Engineering and Technology, etc.

It would depend on what specialisation you have picked up in MBA.

Applying for polytechnic course can be done in two methods, either through entrance test or by fulfilling basic eligibility criteria of the board/college. The minimum qualification required for admission into a Diploma course is passing 10th examination, with at least 35 percent in science and maths

For better growth prospects and exposure pursue BCA / B.Tech in computers/B.Sc (computer science).

Use COMEDK college predictor for predicting the colleges you can get based on your rank. Link is given below:
https://www.shiksha.com/b-tech/resources/comedk-college-predictor

In Coimbatore there are 2 top colleges - PSG and Amrita. Whereas in Chennai SRM, Satyabhama and VIT are top colleges.

CSE field needs knowledge about computer programming languages and computer design and many more. Civil engineering needs knowledge about engineering drawings, constructions, etc. The choice is yours. In which field are you comfortable or interested more?
According to me, CSE is better.

You have scored less marks so you can go for your state government engineering colleges or some choose a private college.