Prime Minister Narendra Modi on Tuesday called on President Pranab Mukherjee to mark the first anniversary of the National Democratic Alliance (NDA) government.The picture of Modi meeting the President was tweeted by the official twitter account of the Prime Minister's Office.Modi and his cabinet were sworn-in at a glittering ceremony May 26 last year, attended by heads of state or governments or representatives of all South Asian Association for Regional Cooperation (SAARC) countries.