An iron and steel company will commend three model workers on May Day. The candidates selected by the six branches are Wang of the first company, Qian of the second company, Zhu of the third company, Wu of the fourth company, Lu of the fifth company, six Company Qi Mou. The company decided to choose one from one of three companies; one from two or five companies; and two candidates from three or five companies could not be selected at the same time as the candidates from the two companies. According to the above conditions, if the candidates of the five companies are not selected, Which of the following? Must be selected at the same time. ['Wang, Qian.', 'Qian, Wu.', 'Qian, Qi.', 'Wang, Qi.']