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': 'If both husband and wife are suffering with Achondroplasia, what are their chances of having a normal child? \nSelect and explain. \nA. 0%, B. 25%, C. 50%, D. 100%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: . 25%', 'role': 'assistant'}]