20th August is celebrated as
A. Earth Day
B. Sadbhavana Divas
C. No Tobacco DayD. None of these

Former Prime Minister, Rajiv Gandhi's birthday is celebrated as Sadbhawana Diwas on 20th August. Rajiv Ratna Gandhi was an Indian politician who served as the 6th Prime Minister of India from 1984 to 1989. He took office after the 1984 assassination of his mother, Prime Minister Indira Gandhi, to become the youngest Indian Prime Minister at the age of 40. Gandhi was a scion of the politically powerful Nehru–Gandhi family, which had been associated with the Indian National Congress party. For much of his childhood, his maternal grandfather Jawaharlal Nehru was Prime Minister. Gandhi attended college in the United Kingdom. He returned to India in 1966 and became a professional pilot for the state-owned Indian Airlines. In 1968 he married Sonia Gandhi.
Rajiv Gandhi's last public meeting was on 21 May 1991, at Sriperumbudur, a village approximately 40 km (25 mi) from Chennai, where he was assassinated while campaigning for the Sriperumbudur Lok Sabha Congress candidate. At 10:10 pm, a woman later identified as Thenmozhi Rajaratnam, approached Gandhi in public and greeted him. She then bent down to touch his feet and detonated a belt laden with 700 g (1.5 lb) of RDX explosives tucked under her dress.