This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': "A baby's blood group was determined as O Rh negative.Select the blood group the baby's mother or fatherwill not have. \nSelect and explain. \nA. A, Rh Positive, B. B,Rh Positive., C. AB,Rh Negative, D. O, Rh positive", 'role': 'user'}, {'content': 'Answer: C \nExplanation: . AB,Rh Negative', 'role': 'assistant'}]