D Subbarao, former governor of the Reserve Bank of India is currently in news for his just released book 'Who Moved My Interest Rate?', where he shares his experiences as the head of the Indian central bank during the turbulent years of 2008 to 2013. Speaking to Govindraj Ethiraj, Editor, Boom, Subbarao shares his views on the tight-rope walk that most governors have to do when dealing with the Central government and what steps he would have taken to clean up the NPA mess in the banking system.