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': 'An X-linked recessive disease is characterized by the following inheritance : \nSelect and explain. \nA. Veical transmission, B. 50% female carriers if male is affected and female is normal, C. 50% male affected if female is carrier and male is normal, D. 50% male carriers if female is affected and male is normal', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer is C (50% male affected if female is carrier)', 'role': 'assistant'}]