Verified Answer :

The leader who was put in jail for fighting apartheid in South Africa was "Nelson Mandela," although it should be noted that other protestors were jailed for this cause as well. 

Answer:

Nelson Mandela

Explanation:

Nelson Mandela was put in jail for saying the rights of black people he then was put in jail for 27 years 4 of them in house jail wich is like quarantine and then he became president of South Africa and the black people in South Africa had a right to do everything like white people so the awnser is Nelson Mandela