Complex sentence: Bikash Bhattacharya or Bikash Ranjan Bhattacharya (Bengali বিকাশ রঞ্জন ভট্টাচার্য্য) is the present mayor of Kolkata (2005-2010 session), heading Kolkata municipal corporation, in the Indian state of West Bengal.
Split into simpler sentences: Bikash Bhattacharya or Bikash Ranjan Bhattacharya (Bengali বিকাশ রঞ্জন ভট্টাচার্য্য) is an Indian politician. He served as mayor of Kolkata 2005-2010, heading the Kolkata municipal corporation, in the state of West Bengal.