Prime Minister Narendra Modi named the 21 largest unnamed islands of Andaman and Nicobar Islands after Param Vir Chakra awardees in a ceremony on Monday on the occasion of Parakram Diwas. PM Modi also unveiled the model of the National Memorial dedicated to Netaji to be built on Netaji Subhas Chandra Bose Dweep, earlier known as Ross Islands. Home Minister Amit Shah was also present at the ceremony in Andaman and Nicobar Islands.