Hey Mubarak, first of all congrats for the good score acheived by you. Yes, there a number of government colleges available at 528 obc A rank. I am suggesting you some colleges:

1. University of Calcutta, Kolkata (CSE, IE, Chemical, electrical)

2. Jadavpur University, Kolkata (CSE, civil, EE)

3. Maulana abdul kalam azad university of technology, kolkata (CSE, IT)

4. University of Kalyani, kalyani (electronics and instrumentation eng, IT)

5. Government college of engineering and leather technology, kolkata (CSE).

There are many more options available. You need to first decide which branch you wish to pursue in, probably after that you would be able to get a more precise list of government colleges you can have. I am providing you with the link of career 360 college predictor tool, you can vary your preferences and see all the available colleges at your rank as per the previous years cutoffs: https://engineering.careers360.com/wbjee-college-predictor