The correct answer is (d). Nelson Mandela was released from jail after 27 years on March 31, 1990. He was arrested in 1962 and charged with sabotage and conspiracy to overthrow the government. He was sentenced to life in prison and spent the next 27 years in Robben Island Prison. His release was a major turning point in South African history and led to the end of apartheid.
(a) February 11, 199 is an incorrect answer. Nelson Mandela was not released from jail on this date.
(b) January 26, 1990 is an incorrect answer. Nelson Mandela was not released from jail on this date.
(c) December 6, 1989 is an incorrect answer. Nelson Mandela was not released from jail on this date.