Chennai, Nov 8 A year since the implementation of demonetisation, actor-filmmaker Prakash Raj on Wednesday demanded an apology from the central government for committing the "biggest blunder". In a post titled "To whomsoever it may concern", Prakash wrote on Twitter: "While the rich found ways to convert their black money into shiny new notes, this disruptive impact made millions suffer helplessly and the unorganised sector workers went for spin. Would you mind saying sorry for the biggest blunder of our time?" On November 8, 2016, Prime Minister Narendra Modi announced demonetisation of Rs 500 and Rs 1,000 notes which, he said, was aimed at "eradicating black money and terror funding". Last week, Prakash -- a popular name in the Kannada, Telugu and Tamil film industries -- supported actor Kamal Haasan's views on "Hindu extremists". A month ago, Prakash had also condemned the "silence" of Modi on certain sections "celebrating" the murder of journalist Gauri Lankesh in Bengaluru on social media. He had said Modi's silence was "chilling".