Vice President M Venkaiah Naidu and Prime Minister Narendra Modi today paid tributes to former Prime Minister Pamulaparthi Venkata Narasimha Rao on his birth anniversary. In a tweet, Mr. Naidu said, a visionary statesman and a towering intellectual, P V Narasimha Rao ushered in major economic reforms.<br />''<br />''In a tweet, Mr. Modi said, India is grateful to him for his rich contribution to national progress. He added that the former Prime Minister also made a mark as a great scholar and intellectual.<br />''<br />