Who was the south African prime minister in 1990?

In 1990, the Prime Minister of South Africa was Janie W. "Julius" Malan. However, it's important to note that the position of Prime Minister was abolished in 1994, and the country transitioned to a parliamentary system with a President as the head of state. Nelson Mandela was released from prison in February 1990, marking a significant turning point in South Africa's history.