NEW DELHI: PM Narendra Modi Sunday paid tributes to Syama Prasad Mookerjee on his birth anniversary, calling him "an immortal son of the nation" and hailing his sacrifice for national unity. BJP president J P Nadda paid floral tributes to Mookerjee at Parliament's Central Hall.Modi said: "He sacrificed his life to protect the honour, dignity, and pride of the country. His ideals and principles are invaluable in the construction of a developed and self-reliant India". In a post on social media, Nadda said, "His ideals and principles continue to inspire and guide us in our dedicated service to the nation".Union minister Amit Shah posted: "In the history of independent India, Mookerjee ji is a name for whom nothing was greater than unity and integrity of the nation." Bengal CM and TMC supremo Mamata Banerjee also paid homage to him.UP CM Yogi Adityanath offered floral tributes to Mookerjee at a programme in Lucknow. Union minister Dharmendra Pradhan said: "Mookerjee's life is an invaluable heritage for Indian politics and nationalism."