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: Medicine
[{'content': "Which is X-linked dominant conditions ? \nSelect and explain. \nA. Phosphate diabetes, B. Hemophilia, C. Gaucher's disease, D. Cystic fibrosis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]