Final answer:
Isabel Perón became President of Argentina following the death of her husband, Juan Perón, in 1974.
Step-by-step explanation:
When Juan Peron died in 1974, his wife Isabel Perón succeeded him as the President of Argentina. Juan Perón had returned from exile and was reelected as president in 1973, after previous terms in office. Upon his death, Isabel Perón, who was vice-president at the time, rose to the presidency, becoming the first female president in the Western Hemisphere. Eva Perón, also known as “Evita,” had passed away from cancer in 1952, long before Juan Perón's final term. Neither Raúl Alfonsín nor Carlos Menem was president immediately following Juan Perón's death, as they served later in the history of Argentina.