CHENNAI: On a day when Prime Minister Narendra Modi was set to arrive in Chennai, Union coal minister Pralhad Joshi on Saturday announced that all three blocks in Tamil Nadu, proposed to be auctioned for coal mining, would be exempted.Pralhad Joshi, on Twitter, said the decision to exempt Tamil Nadu was taken based on the welfare of the people of Tamil Nadu. "BJP Tamil Nadu president K Annamalai rushed...