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': 'What is the chance of having Homocystinuria if only one parent is affected and the other is normal? \nSelect and explain. \nA. 25%, B. 0%, C. 50%, D. 75%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Homocystinuria is autosomal recesive disorder.If one parent is affected and the other is normal,none of the children will be affected.', 'role': 'assistant'}]