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: Unknown
[{'content': 'Which of the following disease is X-linked? \nSelect and explain. \nA. Thalassemia, B. Colour blindness, C. Sickle cell anemia, D. Galactosemia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref. Robbins Pathology. 9th edition. Page. 142\nBelow is a list of few X- Linked disorders from Robbins', 'role': 'assistant'}]