Xiao Zhou, Xiao Wu, and Xiao Zheng, one is a worker, one is a peasant, and one is an intellectual. Known: Xiao Zheng is older than intellectuals; Xiao Zhou is different from farmers; younger farmers are younger than Wu Xiao. Based on the above, which of the following is the correct decision? ['Xiao Zhou is a worker, Xiao Wu is an intellectual, Xiao Zheng is a peasant.', 'Xiao Zhou is an intellectual, Xiao Wu is a farmer, and Xiao Zheng is a worker.', 'Xiao Zhou is an intellectual, Xiao Wu is a worker, Xiao Zheng is a peasant.', 'Xiao Zhou is a worker, Xiao Wu is a farmer, Xiao Zheng is an intellectual.']