Out of 250 largest emitters, India's state-owned company 'Coal India' topped the list with largest GHG emission- 2076.2 million tonnes. Besides Coal India, three other Indian companies are among 100 global businesses with the highest carbon footprint.
Links:
[1] http://admin.indiaenvironmentportal.org.in/reports-documents/large-businesses-larger-emission-footprints
[2] http://admin.indiaenvironmentportal.org.in/category/publisher/india-environment-portal
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industry
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases