If Li Jia passed the exam, then Li Hua, Sun Tao and Zhao Lin must have passed. From this. ['If Li Jia fails the exam, then at least one of Li Hua, Sun Tao and Zhao Lin failed.', "If Li Hua, Sun Tao and Zhao Lin all pass, then Li Jia's results will definitely pass.", "If Zhao Lin's results fail, Li Hua and Sun Tao will not pass both.", "If Sun Tao's results fail, Li Jia and Zhao Lin will not pass the test."]