Name the Social entrepreneur from Tamil Nadu, who was ranked 45th in the Fortune magazine's 2019 list of the world's greatest leaders for inventing low cost pad making machine.

An American biographical comedy-drama film "Green Book" has won the Best Picture at 91st Academy Awards at the Dolby Theatre in Los Angeles on 25th February 2019. Green Book also won best supporting actor for Mahershala Ali and best original screenplay. In it, British actress Olivia Colman won the best actress award for "The Favourite" for her performance as Queen Anne in the period comedy-drama. Rami Malek won the best actor for a biographical film "Bohemian Rhapsody". Filmmaker Alfonso Cuaron won Best Director Oscar for 'Roma', which is an American and Mexican drama. 'Roma' also won Oscars in the Best Foreign Language Film and Best Cinematography category. Pop diva Lady Gaga got the Best Original Song Academy Award for "Shallow" from her feature debut "A Star is Born". Marvel's Black Panther too won 3 Oscars - Best Original Music, Best Costume Design and Best Production Design.

Japan is testing the fastest-ever shinkansen bullet train, capable of speeds of as much as 400 kilometers (249 miles) per hour. Called the Alfa-X, the train is scheduled to go into service in 2030. Rail company JR East plans to operate it at 360 kilometers per hour. That would make it 10 kph faster than China's Fuxing Hao, which links Beijing and Shanghai and has the same top speed.

Former Lok Sabha speaker Somnath Chatterjee passed away. He was 89 years old. Chatterjee was the Speaker of the Lower House from 2004-09 when Manmohan Singh-led UPA- 1 (United Progressive Alliance) was in power.

Former Prime Minister of Nepal Tulsi Giri has passed away in Kathmandu. He was 93. Giri was suffering from liver cancer for a long time. He twice served as the prime minister of Nepal first from 1962 to 1964 and again from 1975 to 1977.

Manchester City won the English Premier League football title for a second successive year. Liverpool gained second place in the league. The Manchester City club maintained its dominance by finishing the campaign with 14 straight wins and 98 points. It clinched the title by beating host Brighton & Hove Albion Football Club (or Brighton FC) with 4-1 on seasons final day. This was City's 4th Premier League title in last eight years.

According to Fitch Solutions Macro Research report, India is probably going to install 54.7GW of wind capacity by 2022 against the 60 GW target set by the government. This wind capacity installation is a part of India's ambitious target of installing 175 GW of renewable energy capacity by the year 2022 which includes 100 GW from solar, 60 GW from wind, 10GW from bio-power and 5 GW from small hydro-power.

PM Narendra Modi inaugurated supercomputer 'Param Shivay' at IIT-BHU.The supercomputer of 833 teraflop capacity built at the cost of Rs 32.5 crore. Additional Information: India's first supercomputer called PARAM 8000 was launched in 1991. He released commemorative postage stamp on completion of 100 Years of IIT BHU.

Mizoram assembly passed a bill to bring back total prohibition of liquor in the northeastern state after four years. The state government decided to prohibit the manufacture, import, sale, and consumption of liquor for the common people for their general health. Earlier total prohibition was in force in Mizoram from 1997 to 2015.