The blood types of A. B, C, and D are different. A said: "I am A. " B said: "I am O. " C said: "I am AB. " Ding said: "I Not AB. "The words of only one of the four are false. Which of the following is true? ['No matter who tells lies, the blood type of four people can be introduced.', 'If B is false, it can introduce the blood type of four people.', "If C's leave is false, it can introduce the blood type of four people.", "Ding's words are false, which can introduce the blood type of four people."]