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': "Father’s blood group is ‘A’ & mother’s blood group is ‘AB'. Which of the following blood group is not possible in any of their children? \nSelect and explain. \nA. A, B. B, C. O, D. AB", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]