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 34-year-old, G, P0, presents for genetic counselling at 12 week's gestation. The patient has two sisters and a brother; her father\nhas haemophilia. Her siblings are not affected, but she has a nephew that is: \nSelect and explain. \nA. Autosomal recessive, B. X-linked inheritance, C. Mitochondrial inheritance, D. Multifactorial inheritance", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Haemophilia is an X-linked recessive disease. These diseases are more common in men than in women.\nAn affected male will not pass the diseases to his sons, but all daughters will be carriers. X-linked recessive diseases are transmitted from carrier women to affected men.', 'role': 'assistant'}]