Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. February 12, 2012 Venezuela Chooses Chavez Challenger VOA News Opposition presidential candidate and Zulia's state governor Pablo Perez (C) waves to supporters during a rally in Caracas February 9, 2012. Photo: Reuters Opposition presidential candidate and Zulia's state governor Pablo Perez (C) waves to supporters during a rally in Caracas February 9, 2012. Venezuela's opposition parties are holding a primary Sunday to choose a single candidate to run against President Hugo Chavez in the October presidential elections. Sunday's vote marks the first time the opposition will back a single candidate to unseat the 57-year-old president. The top contenders are under 45 and represent a new generation of anti-Chavez leaders. The front-runner in the opposition contest is 39-year-old Henrique Capriles, the governor of Miranda state. His main opposition rival is Pablo Perez, who is 42, and the governor of western Zulia state. Chavez underwent chemotherapy in Caracas and Havana last year and now says he is cancer-free. He is seeking a third six-year term in the October vote. President Chavez has been in power since 1999. Some information for this report was provided by AP, AFP and Reuters. .