Concept:The president who handed over power to Nelson Mandela in 1994 was the last apartheid-era state president.
Explanation:Nelson Mandela became the first democratically elected president of South Africa in 1994.
The person who directly preceded him as state president was Frederik Willem de Klerk.
De Klerk served as state president from 1989 to 1994.
He oversaw the dismantling of apartheid and the transition to universal suffrage.
After the 1994 elections, he served as deputy president under Mandela.
Thabo Mbeki, Jan Christiaan Heunis, and Pieter Willem Botha did not hold the presidency immediately before Mandela.
Answer:B. Frederik Willem de Klerk.