None of the above options is correct. The independent African countries that signed the OAU (Organization of African Unity) Charter on May 25th 1963 were a total of 32 countries. They included Algeria, Angola, Benin, Botswana, Burkina Faso, Burundi, Cameroon, Central African Republic, Chad, Congo (Brazzaville), Congo (Kinshasa), Ivory Coast, Djibouti, Egypt, Ethiopia, Gabon, Ghana, Guinea, Kenya, Liberia, Libya, Madagascar, Malawi, Mali, Mauritania, Morocco, Niger, Nigeria, Rwanda, Senegal, Somalia, Sudan, Tanzania, Togo, Tunisia, Uganda, Zambia, and Zimbabwe.